CD4001 composed of single-channel modulator

Posted on Dec 11, 2010

Core elements of this circuit is the second four-input NOR gate terminal IC CD4001, the entire circuit is simple structure, less components, easy to make, especially for remote

CD4001 composed of single-channel modulator
Click here to download the full size of the above Circuit.

control transmitter or a carrier modulation transmission. As shown in the specific circuit-channel remote control transmitter modulator NOR gate IC1-1, IC1-2 composition multivibrator, the oscillation frequency is 40kHz. On input NOR gate IC1-1 for control terminal, when it is high, the circuit stop vibration; when it is low, start-up circuit. Switch Sl to the control button when Sl is pressed, the input terminal of the NOR gate IC1-1 is low, the oscillator circuit to work, the output 40kHz, 50% duty cycle of continuous square wave. Change in resistance or capacitance Cl R3 can change the oscillation frequency of the circuit. NOR gate ICl-3, ICl-4 composition of the buffer stage for improving circuit drive capability. The modulator output signal sent to the subsequent transmission circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

PLL 1 Watt FM transmitter
90Vrms voltage regulator
Feedback oscillator
Carrier current receiver
The figure based on LM3S101 adopts the controller to design
Solar Cell Voltage Regulator
IC Encoder Chip
iPod FM Transmitter
Robot Tutorials current sensor
Suzuki Wiring Diagrams
Single Display LED Frequency Counter
Over-temperature alarm circuit
Touch a fan speed control circuit
Tone selector circuit