Wein Bridge Oscillator Circuits

In the circuit the frequency trimming component is arranged so that the voltage across it is in quadrature with the voltage V0 from the bridge so that as it is adjusted the attenuation of the bridge only changes a little, avoiding the need for a two gang....


In FSK, two discrete frequencies are used to represent the binary digits 0 and 1. The heart of the circuit consists of two Wienbridge oscillators built using a dual op amp LM 1458, for the two frequencies. The two frequencies are enabled corresponding to....

This circuit utilizes an HA5152 dual op amp and FET to produce a lowvoltage, lowpower, Weinbridge sinewave oscillator. Resistors R and capacitors C control the frequency of oscillation; the FET, used as a voltagecontrolled resistor, maintains the gain....

A variable Wien bridge provides frequency tuning from 20 Hz to 20kHz. Gain control comes from the positive temperature coefficient of the lamp. When power is applied, the lamp is at a low resistance value, the gain is high, and oscillation amplitude....

Ql is a fixed oscillator operating at 455 kHz. Ul is a mixer, with its own internal oscillator running at 45..

The circuit"s frequency oscillation is /=2.8/ [Cix(/i + i2)]Â· Using the values shown, the output frequency can be varie..


A1 and its associated components furnish an amplitude stable sine wave source. All positive feedback path is a Wein bridge, tuned for 1.5 kHz, Ql, the LT1004 reference, and additional components in Al's negative loop unitygain stabilize the amplifier. Al's....

Incandescent lamp has been used to reduce harmonic distortion in sine oscillator circuit. The nonlinear resistance characteristic of the lamp filament help the circuit to shape the signal to approximate the ideal sine wave. Here is the classic Wienbridge....





This circuit is Wein Bridge Sine Wave Oscillator. The main problem in producing low distortion, constant amplitude sine wave to get the right loop gain amplifier. By using the 2N3069 JFET as variable resistor in the feedback loop voltage amplifier, this can....

The Wienbridge oscillator is a unique circuit because it generates an oscillatory output signal without having a sinusoidal input source. Instead, it uses capacitors with initial voltages to create the output. This circuit can be especially useful if....


The wein bridge osillator employs as balanced wein bridge as the feedback network. Two stage common source amplifier provide 360 degree phase shift to the signal. The attenuation of the bridge is calculated to be 1/3 at resonant frequency. There for the....

Wien bridge oscillator is an audio frequency sine wave oscillator of high stability and simplicity. Before that let us see what is oscillator An oscillator is a circuit that produces periodic electric signals such as sine wave or square wave. The application....


hello, i am doing a practical on lm 741. i want to make it to use it as an wein bridge oscillator.the value of c1=c2=0.01uF, R1=R2=3K, Rf=2k, Ra=1k.acc....

Hi I am testing wein bridge oscillator and I looking to make it work. I have study the page below, but there are some concept i do not understand....
