Audio Engineering

Fundamentals and Instruments 875

 

 

 

0V

0V

0V

1K0

D

1N4148

R^3 1K0

R^1

TH1

Output sinewave

TL071

Input

Y

X

C^2

R^2

R^4

R^5 R^6

RV1100 K



Vref Vref

D^2 Set mark tospace ratio

Voltage comparator

A^1

A^2

A^3

LM311

Square wave out

C^1

Op. amp.

Figure 30.1 : Basic Wien bridge oscillator and add-on square-wave gener

ator.