Question

Consider the oscillator circuit shown below. The op amp i s ideal Rb Vo R2 = 10 kΩ L2 100 mH R1 1 k2 L1 = 10 mH a. What is the frequency of oscillation in Hz? b. Specify the required value of Rb sustain oscillations. c. A limiter circuit is added to oscillator by separating Rb into two series resistors Rb1 and Rb2 as shown in the next page along with two anti-parallel diodes in shunt with Rb2. determine the values of Rb1 and Rb2 so that the amplitude of Vo is 10V base-to-peak. Note that Rb1 Rb2 must equal the value of Rb found in step 2).The positive feedback portion of the circuit is not shown for simplicity D1 Rb2 Rb1 1 ks2 D2 Vo

Answer 1

Rb nivero that 2a -t Vo. し2 R 2

리 ·へ/o 2122 RIHUo 니 3 3

3 2バ APEI 21D21 Ra t values 2 b