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Questions tagged [wien-bridge]

Anything related to Wien bridge circuits. A Wien bridge is a particular bridge circuit configuration in which two sides of the bridge are purely resistive, whereas the other two are made up by resistors in parallel with capacitors. Wien bridges are commonly used in linear oscillators for producing sinusoidal signals.

Anything related to Wien bridge circuits.

A Wien bridge is a particular bridge circuit configuration in which two sides of the bridge are purely resistive, whereas the other two are made up by resistors in parallel with capacitors.

Wien bridges are commonly used in linear oscillators for producing sinusoidal signals.

See also Wikipedia on Wien bridge.

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Make old telephone ring

I recently found one of those old rotary dial telephones in my garage and amazingly it still is fully functional (I tested it by hooking it to the phone line). As I have no use for it as a telephone anymore, what I want to do is to make it ring on…
user1371019
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Is this a suitable sine wave osc? how would I control the frequency?

Overview- I'm making a bank of analog sine wave oscillators and I'm interested in keeping the design compact. I've started by making a Wien Bridge oscillator. As I'm working from a single power supply and I'm trying to keep the design small, I've…
Jim
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What is the function of the bulb in a Wien bridge oscillator?

In this answer it is said that the bulb in a Wien bridge oscillator is for temperature compensation. Is that true? (I thought it is a kind of AGC to stabilize the output level.)
radagast
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JFET Burn Out in Wien Bridge Oscillator

I have a simple Wien Bridge Oscillator (with JFET gain control) circuit pictured below. This circuit works as expected at lower voltages (+/-9 V), but I am running into some problems with higher voltage supplies (+/-16 V). I believe the JFET…
Two Nybble
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JFET stabilised wien bridge component ratios

I find myself in need of a sine wave oscillator and have decided on the wien bridge. I have followed all the tutorials but have a few questions that do not seem to be answered elsewhere. Firstly, I understand the ratio between Rf and R3 determines…
benDR
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Problems with Wien Bridge oscillator circuit simulation in Mutisim

I am trying to build a Wien bridge oscillator that oscillates at 2.1kHz and that can be switched on by a transistor. The reason for me placing a transistor switch in the circuit is so that I can turn the oscillator on and off from a PIC MCU.…
D Brown
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Transistor Based Wien Bridge Oscillator

I've been studying the schematic for this RLC Bridge from Heathkit (IB-5281). The full pdf can be found here (search for the part number): http://www.vintage-radio.info/heathkit. The circuit contains an AC source to drive the bridge which is…
Buck8pe
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Problem with Wien's Bridge basic working and simulation in multisim

I am very new to the concept of Wien's bridge and am trying to make a basic circuit of it but didnt get the expected output (noise only).Tried to simulate on Multisim but got the same output.I have gone through many documents on the web but they…
akki
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Electronic metronome Wien oscillator

I've got to analyze an electronic metronome schematic and I'm having trouble understanding how the oscillator in this schematic really works. I believe it's a Wien oscillator with variable output wave frequency. Diodes in negative feedback loop are…
t_nogic
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Troubleshooting wien bridge oscillator circuit with 741 op amp

I built the standard Wien bridge oscillator circuit using the UA741CN op amp IC, however I am not getting any oscillation. I am powering this circuit with two 9V batteries. I'm using the values R1=R2=10KΩ, C1=C2=100nF, R3 = 1KΩ, R4 = 470Ω. The…
tavr
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Low frequency sinus generator

I would like to build a sinus frequency generator that can be controlled via an Arduino. Sinus frequency would be in the low frequency regime (below 100 Hz) with a voltage around 2.5 Volts peak to peak. I will have to use the SPI interface SPI…
user2145488
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Why doesn't this Wien Bridge oscillator work?

See the circuit. I am running this from a 24 V supply. I need it to oscillate at about 700 Hz. Does anybody see anything wrong with the circuit? I have spent about 3 days trying to figure it out, but I cannot seem to do so.
SlowMovingAir
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Frequency of square wave generated by Wien bridge oscillator

I have designed the wien bridge oscillator circuit for 20Hz square wave generation. It gives a 20Hz sinusoid as output when I keep the non-inverting amplifier gain 3V/V. But when the non-inverting amplifier gain is very large, the circuit gives a…
M. Fahmin
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Wien Bridge Oscillator: Why does equating the real part to 0 give the gain equation?

I am learning about Wien bridge oscillators. Following Experiment No. 9: WIEN BRIDGE OSCILLATOR USING OPAMP, they use the following schematic: They then arrive at the following equation half-way down page 3: They then equate the imaginary part to…
gbmhunter
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What is the purpose of the anti-parallel diodes in this Wien Bridge oscilator circuit?

In the following op-amp circuit: Rf here is replaced by the following: What do the anti-parallel diodes here serve? This is a Wien Bridge oscillator circuit and I am showing only the negative terminal of the op-amp. Once the diodes are removed the…
Yiannis Michael
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