Voltage-to-frequency-converter


Posted on Jan 12, 2013

This circuit can accept positive or negative or differential control voltages. The output frequency is zero when the control voltage is zero. The 741 op amp forms a current source controlled by the voltage Ec to charge the timing capacitor C1linearly. NE555 is connected in the astable mode. so that the capacitor charges and discharges between 113 Vee and 213 Vee·


Voltage-to-frequency-converter
Click here to download the full size of the above Circuit.

The offset is adjusted bY the 10-K potentiometer so that the frequency is zero when the input is zero. For the component values shown: f = 4.2 Ee kHz. If two de voltages are applied to the ends of R1 and R4, the output frequency will be proportional to the difference between the two voltages.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Rain Detector
Coil Driver/launcher circuit
100M-baud-fiber-optic-receiver
2800w high power audio amplifier
5V Boost Converter using LTC3440
pendulum controlled clock
Record audio with the MSP430 microcontroller
USB As A Power Source
PIC based Oscilliscope
Understanding the WB5LUA GaAsFET Bias circuit



Top