Position: Index > 555 Circuit >

555 Simple Voltage-controlled Oscillator

2015-02-05 16:49  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


555 Simple Voltage-controlled Oscillator
As shown in the picture 3-10, the circuit take the 555 and FET 3DJ6 as its key part to constitute a controllable multi-vibrator. As soon as terminal A and B controlled by voltage Vk, equivalent resistance between drain and source of 3DJ6 will change thereby. So, it causes the frequency change of 555. f=1.44/(R1+2RDS)C1 This circuit can also be applied in various situations such as to transform V/F,or to identify different tones, etc.