Three more op amps are connected to form a quadrature oscillator, which makes a set of sine and cosine waves that draw a circle representing the ball. The simulator’s output signals are ...

The amplified oscillator output varies the amount of ... Some do so using valves, but most run on JFETs, transistors or op-amps. For modern optical tremolo, an LDR is usually combined with an ...

[Jule]’s little analog synth uses a single IC for both the oscillator and the amplifier — a TL072 op-amp. The rest is made of purely discrete components. [Jule] says those momentary switches ...