Exercise 9.7 Something else like a Wien bridge oscillator

a)


An answer:

Hloop() = A H1() H2() H1() = R1 R1 + jωL = 1 1 + L R1 H2() = R2 R2 + 1jωC = R2C 1 + jωCR2 Hloop() = A 1 1 + L R1 R2C 1 + jωCR2 = A R2C 1 + ( L R1 + R2C) ω2R2 R1LC

ωosc = 1 R2 R1LC

b)


An answer:

A = 1 + L R1R2C