Figure 5.11. The lower input terminal is grounded. The upper input terminal goes to the negative end of C1, 4.7 u f. The positive end goes to the base of Q1, 2N3904. The base goes to Vcc through R1, 27 k ohms. The base also goes to ground through R2, 47 k ohms. The emitter goes to the positive end of C2, 100 u f. The negative end goes to ground through R7, 470 ohms. We will return to the emitter later. The collector goes to Vcc through R3, 1 k ohm. The collector of Q1 goes to the base of Q2, 2N3906. The emitter of Q2 goes to Vcc. The collector goes through R5 then through R6 to ground. Both R5 and R6 are 1 k ohm. The junction of R5 and R6 goes through R4, 5.6 k ohm to the emitter of Q1. The collector of Q2 goes to the positive end of C3, 1 u f. The negative end goes to the upper output terminal. The lower output terminal is grounded. End verbal description.
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