# 1 kHz Wien-Bridge Oscillator

The starting pulse is generated by the positive power supply’s startup slope.  If the power supply does not slew fast enough  the oscillator will not start. R3 can be increased to increase the gain and likelihood of starting.  It also increases distortion when  the amplitude as the peaks aproach the power supply rails. (Circuit is created by John Bishop  based on a design by Neil P. Albaugh.)

1 kHz Wien-Bridge Oscillator circuit:

## Online Simulation of the “1 kHz Wien-Bridge Oscillator” Circuit

The great feature of the TINA circuit simulator that you can analyze this circuit immediately with TINACloud the online version of TINA. Of course you can also run this circuit in the off-line version of TINA.

Click here to invoke TINACloud and analyze the circuit, or watch our tutorial video!

You can send this link to any TINACloud customers and they can immediatelly load it by a single click and then run using TINACloud.

Michael Koltai
www.tina.com

# Triangle & Square Wave Oscillator 1kHz

This simple relaxation oscillator provides both a square- wave and a triangular- wave output. This oscillator is biased for operation on a single +5V supply. The DC component of each output can be removed by capacitive coupling if necessary.Since a rail-to-rail output op amp is used for U1, the square wave output amplitude is the same as its supply voltage. Alower quiescent current op amp such as an OPA364 can be used if Iq is important. Oscillator frequency is determined by C1 & R1. The Transient Analysis used the “Zero initial conditions” to aid the oscillator start- up. This start- up time is visible for the first few milliseconds in the waveform above. (Circuit is created by Neil P. Albaugh  TI- Tucson)

“Triangle & Square Wave Oscillator 1kHz” circuit:

## Online Simulation of the “Triangle & Square Wave Oscillator 1kHz” Circuit

The great feature of the TINA circuit simulator that you can analyze this circuit immediately with TINACloud the online version of TINA. Of course you can also run this circuit in the off-line version of TINA.

Click here to invoke TINACloud and analyze the circuit, or watch our tutorial video!

You can send this link to any TINACloud customers and they can immediatelly load it by a single click and then run using TINACloud.

Michael Koltai
www.tina.com