Function generator


Posted on Dec 10, 2012

The circuit has both square-wave and triangle-wave output. The left section is similar in function to a comparator circuit that uses positive feedback for hysteresis. The inverting input is biased at one-half the Vcc voltage by resistors R4 and R5. The output is fed back to the non-inverting input of the first stage to control the frequency. The amplitude of the square wave is the output swing of the first stage, which is 8 V peak-to-peak. The second stage is basically an op amp integrator.


Function generator
Click here to download the full size of the above Circuit.

The resistor R3 is the input element and capacitor Cl is the feedback element. The ratio R1/R2 sets the amplitude of the triangle wave, as referenced to the square-wave output. For both waveforms, the frequency of oscillation can be determined by the equation:




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

PIC16F84A Gas Detector
Automatic Light Controller Using 7806
LM2889 Lm2889 Tv Video Modulator - National Semiconductor
Speaker Microphone Circuit
Management of Locomotive Tractive Energy Resources
The equivalent circuit and a local oscillator
Frequency sensitive rheostat for manual and automatic way starting circuit
The beginning and end of a three-phase motor winding speed judgment circuit



Top