1. Electrical Engineering 595 Capstone Design Project
University of Wisconsin-Milwaukee
March 8, 2005

2. Team #2: Staff Ayodeji Opadeyi Brian Felsmann Eenas Omari
Kevin Erickson
Rick Ryer
BSEE,BSCS
BSEE

3. Team #2: Expertise & Experience
Ayodeji Opadeyi Expertise: EMC, Programming (C++, Java, Assembly), Powers, Circuit design, RF
Experience: 1 year Co-op at Harley Davidson
Brian Felsmann Expertise: Communication systems, Fiber Optics, Programming, Digital design.
Experience: 1 year internship at Johnson Controls
Eenas Omari Expertise: Electronics (Filters), Circuit design, RF , Control systems, Digital Design, Communications.
Kevin Erickson Expertise: Motors, AC generators, Analog/Digital Design
Experience: 2 years Co-op at Harley Davidson
Rick Ryer Expertise: Embedded Systems, Microprocessors, Digital Circuits, Assembly Programming
Experience: 4 summer internships at GE medical.

4. Wireless Surround Sound

5. Wireless Surround Sound
Definition:
Wireless surround sound using infrared technology
A plug-n-play system compatible with existing receiver and speakers
Benefits:
No need for unsightly wires around living room
Fast installation of surround sound
Features:
Powerful 70 watt delivered the rear speakers
Maximum operating range of 25 feet
On/Off/Standby modes of operation

6. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

7. Performance Requirements
Power Inputs
AC Power (U.S. and Canada) 95 – Hz
Short circuit protection for transmitter and receiver
ESD Protection
Electrical Interfaces
Analog input from audio receiver
70 watt analog output to speakers
Analog input is digitalized and sent via infrared emitter and photodiode and converted back to an analog signal

8. Performance Requirements
ADC & DAC:
16 bit resolution conversion
44.1 kHz Sampling frequency (minimum)
Total propagation delay from input to output < 30 μs
Amplifier Requirements:
70 Watts peak power
90 dB SNR
0.1% THD

9. Performance Requirements
User Interfaces
On/Off switch on transmitter and receiver
Sight Laser for installation
Operation Modes
On/Off, Standby (Automatic sleep/wake based on signal presence)
Mechanical Interface
On/Off Switches

10. Standard Requirements
Temperature Ranges
Operating Temperatures: 10°C – 40°C
Storage Temperatures: -10°C –70°C
Humidity Ranges
Operating humidity: 2% – 98%
Storage humidity: 2% – 98%
Product Life
5 years
90 day warranty

11. Standard Requirements
Product Dimensions
Transmitter, 6” W x 2” H x 6” L
Transmitter PCB Area: 195 cm2
Receiver, 9” W x 3” H x 9” L
Receiver PCB Area: 466 cm2 for each receiver
Safety Requirements
Primary Safety Standards
UL 6500, IEC 61603, IEC 61558
EMC Safety Standards
INC61204, IEC 55103, IEC61000

12. Safety Standards UL 6500 IEC 61603 IEC 61558 IEC 61204 IEC 61000
Audio/Video and Musical Instrument Apparatus for Household, Commercial, and Similar General Use
IEC 61603
Transmission of audio and related signals using infra-red radiation
IEC 61558
Electrical, Thermal, and Mechanical safety of portable transformers
IEC 61204
Safety and EM requirements of switching power supplies up to 600 V
IEC 61000
Specifies compliance with interference from EM sources and limits EM interference that can be emitted

13. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

14. Transmitter Power Supply
Block Description
Is an electrical device that transforms the standard wall outlet electricity (AC) into the lower voltages (DC).
Will supply voltage to both the Analog to Digital converter (ADC) and the Infrared transmitter (IR Transmitter).
Block Owner: Eenas Omari

15. Block Level Performance Requirements
* User Indicators and Displays:
- Indicator Parameter : Power on LED.
- Indicator Color and Type : Red LED.
- Indicator Viewing Environment: bright light, full darkness.
* Operation Modes:
- Power Mode: ON, OFF.
- Functional Mode: Normal.
* Electrical Interfaces:
Signal Type: Analog.
Signal Direction: Input, Output.
Input Voltage Range: 103 – 132 volts (AC).
Input Frequency Range: 57 – 63 Hz.
Output Voltage Range: 5, +12, -12 volts (DC).
Output Current max. : 400 mA
Block Owner: Eenas Omari

16. Block Level Standard Requirements
* Environmental:
Operating Temperature Range: 10 – 40 oC
Storage Temperature Range: 10 – 40 oC
Operating Humidity Range: 2 – 98 %Rh
Storage Humidity Range: 2 – 98 %Rh.
Block Owner: Eenas Omari

17. Transmitter Power Supply Block Signals
Block Owner: Eenas Omari

18. Over-voltage Protection will be considered in this design
Transmitter Power Supply Design
Voltage Regulator
(DC/DC)
5 Volts
120 volts AC
Isolation
Rectifier
AC/DC
Conversion
Output
Input
Voltage Regulator
(DC/DC)
15 Volts
Over-voltage Protection will be considered in this design
Inverter
Output
-15 Volts
Block Owner: Eenas Omari

19. Block Prototyping Plan
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Transmitter Power Supply
155
195
Outsourced
Direct Solder
N/A
IEC320
Block Owner: Eenas Omari

20. Task-Resource Estimate Summary
* Project definition and system design
phases ~ 110 hours.
* Verification, integration and productization phase ~ 11 hour
* Validation and presentation “final phase” ~ hours.
Total hours:
Total cost of $71 (Which includes PCB board).
Block Owner: Eenas Omari

21. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

22. Performance Requirements
Power Inputs
DC Power 4.75– 5.25 V
Electrical Interfaces
Analog Input, 16 Bit Serial Digital Output
Input-Output SNR
86dB (minimum)
Maximum Throughput Rate
100 kHz
Block Owner: Ayodeji Opadeyi

23. Performance Requirements
Total Harmonic Distortion
0.1%
Analog Characteristics
Offset Error Voltage ±2mV
Noise 20µVrms
Capacitance 25pF
Frequency 20-20kHz
Input Impedance 8Ω
Block Owner: Ayodeji Opadeyi

24. Standard Requirements
Temperature Ranges
Operating Temperatures -40°C – 85°C
Storage Temperatures -65°C –150°C
Humidity Ranges
Operating and Storage humidity 2 – 98%
Max Mass
0.1kg
Block Owner: Ayodeji Opadeyi

25. ADC Block Diagram 5 VDC Input Left Input Serial Output to
IR Transmitters
ADC
Signal
Conditioning
Signal
Conditioning
Right Input
Signal conditioning is to ensure that the signal from the existing audio receiver is within the allowable ADC input voltages
Block Owner: Ayodeji Opadeyi

26. ADC Block Signals
Power
Digital
Analog
Block Owner: Ayodeji Opadeyi

27. Block Prototyping Plan Template
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
ADC 15 40
Outsourced
IC Socket/
Adapters
N/A
Block Owner: Ayodeji Opadeyi

28. Task- Resource Estimate Summary
Estimated total man-hours to complete entire design
Includes specification definition, design, implementation, testing, and fabrication.
Estimated total cost of $55
Includes parts and fabrication costs of PCB
Block Owner: Ayodeji Opadeyi

29. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

30. IR Transmitter and Receiver
Block Description
Transmit 2 channels of digital audio to their respective IR receiver/amplifier.
Receives 16 bits of serial data from the ADC block per channel (left and right).
Be able to transmit the signals 25 feet to IR receiver.
Block Owner: Kevin Erickson

31. Performance Requirements
Power Inputs
5 Volts DC power from Transmitter Power Supply block for IR Transmitter
±15 Volts DC power from Receiver Power Supply block for IR Receiver
Electrical Interfaces
Serial Digital Input from ADC block
Digital Infrared output to IR Receiver block
Infrared wavelength λ = 950 nm
Serial Digital Output to DAC block
User Interfaces
Sight Laser for easy installation
Block Owner: Kevin Erickson

32. Standard Requirements
Temperature Ranges
Operating Temperatures: -40°C – 100°C
Storage Temperatures: -40°C –100°C
Humidity Ranges
Operating humidity: 2% – 98%
Storage humidity: 2% – 98%
Safety
IEC 61603
Transmission of audio and related signals using infrared radiation
Block Owner: Kevin Erickson

33. IR Transmitter Block Signals
Power
Digital
Block Owner: Kevin Erickson

34. IR Transmitter Design Infrared Emitter Driver 0 1 0 1 0 1 0
16 bit serial data sent via Infrared Emitter (950 nm)
Digital Audio sampled at 44.1 kHz
16 bit serial data
ADC
The input is a series of 0’s and 1’s from the ADC block.
The output is infrared pulses of the 0’s and 1’s sent to a photodiode in the IR Receiver
Block Owner: Kevin Erickson

35. IR Receiver Block Signals
Power
Digital
Block Owner: Kevin Erickson

36. IR Receiver Design Photodiode Transimpedance Amplifier Comparator
16 bit serial data sent via Infrared Emitter (950 nm)
16 bit serial data to DAC block
Photodiode
Transimpedance
Amplifier
Comparator
DAC
Photodiode receives the infrared signal and converts the light signal to current
The transimpedance amplifier is needed to convert the current into an amplified voltage
Comparator is used to create the 5 Volt logic (0’s and 1’s) needed by the ADC block
Block Owner: Kevin Erickson

37. IR Transmitter Prototyping Plan
Block
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
IR Transmitter 25 40
Outsourced
Direct Solder
N/A
IR Receiver 41 61
Complete initial conceptual design on paper
Component selection and performance
Simulate design in PSpice
Purchase components and build circuit
Test circuit in lab setting
Block Owner: Kevin Erickson

38. Resource Estimate Summary for IR Transmitter and Receiver
Estimated 450 total man-hours to complete entire design
Includes specification definition, design, implementation, testing, and fabrication
Estimated total cost of $60
Includes parts and fabrication costs of PCB
Block Owner: Kevin Erickson

39. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

40. Performance Requirements
Power Inputs
DC Power ±4.75– ±5.25 V
Electrical Interfaces
Analog Output, Digital Input
Input-Output SNR
86dB (minimum)
Maximum Throughput Rate
100 kHz
Total Harmonic Distortion
0.1%
Block Owner: Ayodeji Opadeyi

41. Standard Requirements
Temperature Ranges
Operating Temperatures -40°C – 85°C
Storage Temperatures -65°C –150°C
Humidity Ranges
Operating and Storage humidity 2 – 98%
Block Owner: Ayodeji Opadeyi

42. Outputs to Power Amplifier
DAC Block Diagram
Outputs to Power Amplifier
5 VDC Input
Serial Input
from
IR Receiver
Parallel input
to DAC
DAC
Single Output
Serial to parallel
shift register
-5 VDC Input
Block Owner: Ayodeji Opadeyi

43. Block Signals Power
Digital
Analog
Block Owner: Ayodeji Opadeyi

44. Block Prototyping Plan Template
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Types of
Connectors
DAC 20 61
Outsourced
IC Socket/
Adapters
N/A
Block Owner: Ayodeji Opadeyi

45. Task- Resource Estimate Summary
Estimated total man-hours to complete entire design
Includes specification definition, design, implementation, testing, and fabrication.
Estimated total cost of $55
Includes parts and fabrication costs of PCB
Block Owner: Ayodeji Opadeyi

46. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

47. Audio Power Amplifier Introduction and Block Diagram
Amplifies input audio signal from DAC
Outputs amplified audio signal to drive loudspeakers
Requires +/- 35 V from DC Power Supply
Audio Input Signal
Audio Output Signal
DAC
Audio Power
Amplifier
Loudspeaker
+35 V
-35 V
DC Power
Block Owner: Brian Felsmann

48. Audio Power Amplifier Performance Requirements
Electrical Transfer Characteristics
Voltage Gain: 0 – 21.5 dB
Frequency Response: 20 – 20kHz
Signal to Noise Ratio (SNR): 90 dB (min)
Total Harmonic Distortion (THD): 0.1% (max)
Output Power: W RMS
Maximum Noise: nV / root Hz
CMRR: dB (min)
Output Impedance: ohms
Block Owner: Brian Felsmann

49. Audio Power Amplifier Standard Requirements & Thermal Characteristics
Operating Ambient
Temperature Range: °C
Storage Temperature Range: °C
Operating Ambient Relative
Humidity: % RH
Thermal Characteristics
Junction Temperature: 150°C (max)
Thermal Resistance:
Junction to Ambient (θJA) 30°C/W (max)
Junction to Case (θJC) 0.8°C/W (max)

50. Audio Power Amplifier Electrical Interfaces
Analog Signals
Block Owner: Brian Felsmann

51. Audio Power Amplifier Electrical Interfaces Power Signals
Block Owner: Brian Felsmann

52. Audio Power Amplifier Block Level Implementation
Input Stage
Voltage Gain
Amplifier
Output Stage
+ 35 V
-35 V
DC Power
From Digital/Analog
Converter (DAC)
Analog Audio Signal
To Loudspeaker
Analog Audio Signal
Block Owner: Brian Felsmann

53. Audio Power Amplifier Prototyping Plan
Block Area: cm2
Total PCB Area: 255 cm2
PCB Substrate Type: outsourced
Comp Attachment Type: solder
Types of Connectors speaker terminals
Block Owner: Brian Felsmann

54. Audio Power Amplifier Task Resource Estimation Summary
Block Definition & System Design Phase:
Man-hours Estimate: Mhrs
Detailed Block Design Tasks:
Man-hours Estimate: Mhrs (max)
Total Man-hours Estimate: Mhrs (max)
Materials Estimate: $40.00 (max)
Block Owner: Brian Felsmann

55. Refined Block Diagram Transmitter Receiver × 2 Transmitter
Analog Channels from Receiver (Left & Right Rear)
Transmitter
Transmitter
Power Supply
(Eenas)
ADC
(Ayo)
IR Transmitter
(Kevin)
Analog
Digital
Infrared
Receiver × 2
Receiver
Power Supply
(Rick)
Amplifier
(Brian)
DAC
(Ayo)
IR Receiver
(Kevin)
Analog
Digital
Analog Channel to Speaker

56. Performance Requirements
Power Inputs
AC Power (U.S. and Canada) 95 – Hz
Power Outputs
DC Power – Total current output: 5 A
+/ A at each level
+/ A for each level
+/ A
Block Owner: Rick Ryer

57. Standard Requirements
Temperature Ranges
Operating Temperatures 10°C – 40°C
Storage Temperatures -10°C –70°C
Humidity Ranges
Operating and Storage percent humidity 2% – 98%
Block Owner: Rick Ryer

58. Receiver Switching Power Supply
Signal Isolation and Conditioning
(Rectifier to DC)
Voltage Transformer with Regulator
+/- 35 V
AC input
Voltage Transformer with Regulator
+/- 15 V
Voltage Transformer with Regulator
+/- 5 V
Switching
Control
Feedback
&
Isolation
Block Owner: Rick Ryer

59. Prototyping Plan Complete Initial Conceptual design (Paper)
Simulate Design in Pspice
Verify component selection and performance
Purchase components and build circuit
Test circuit in lab setting
Adjust as necessary for “Real World” components
Implement Completed design on PCB
Retest final PCB for proper operation.
Block Owner: Rick Ryer

60. Resource Estimate Summary
Estimated 317 total man-hours to complete entire design
Includes specification definition, design, implementation, testing, and fabrication.
Estimated total cost of $65
Includes parts and fabrication costs of PCB
Block Owner: Rick Ryer

61. Completed Project Package Description
For Transmitter Package
2 PCB boards
First contains ADC, and IR transmitter
Second contains Transmitter Power Supply
For Receiver Package ( x 2)
3 PCB boards
First contains DAC, and IR receiver
Second contains Amplifier
Third contains receiver power supply

62. Project Package Description
Total PCB = 8 for all three packages
Area of PCB for Packages
For transmitter, 195 cm2
For receiver, 466 cm2
Case dimensions
Transmitter – 6” x 2” x 6”
Receiver – 9” x 3” x 9”

63. Resource Comparison Estimated Project Cost - $400
Estimated Project Time – 1750 man-hours
Project Cost Allocation - $500
Project Time Allocation – 1600 man-hours

64. Project Timeline