Presentation on theme: "Chapter 10 Analog Integrated Circuits The 741 OP-AMP Introduction."— Presentation transcript:
Chapter 10 Analog Integrated Circuits The 741 OP-AMP Introduction
Fig The 741 op-amp circuit. Q 11, Q 12, and R 5 generate a reference bias current, I REF, Q 10, Q 9, and Q 8 bias the input stage, which is composed of Q 1 to Q 7. The second gain stage is composed f Q 16 and Q 17 with Q 13 acting as active load. The class AB output stage is formed by Q 14 and Q 20 with biasing devices Q 18 and Q 19 and an input buffer Q 23. Transistors Q 15, Q 21, Q 24, and Q 22 serve to protect the amplifier against output short circuit and are normally off.
Bias Circuit Short-Circuit Protection
Input Stage The Second Stage The Output Stage Device Parameters
Fig The dc analysis of the 741 input stage. The DC Analysis of the 741
Fig The dc analysis of the 741 input stage, continued
Fig Small-signal analysis of the 741 input stage Small-Signal Analysis of the 741 Input Stage
Fig The load circuit of the input stage fed by the two complementary current signals generated by Q 1 through Q 4 in Fig The order of the analysis steps is indicated by the circled numbers.