Temperature-frequency conversion circuit composed of CD4046

The temperature-frequency conversion circuit is an indispensable part of the radio telemetry temperature circuit. Its main principle is to convert the temperature change into the voltage change, and use the voltage change to control the change of the oscillation frequency of an oscillating circuit. The frequency change is encoded by the signal and sent via radio. After the receiver receives the transmitted signal, it is demodulated, converted and decoded, restored to the temperature value and displayed on the display. The temperature-frequency conversion circuit composed of CD4046 is shown in the figure.