초록 ▼

A voltage controlled oscillator circuit is disclosed. A CMOS circuit version is detailed. A relaxation oscillator has its input coupled by way of a voltage follower buffer to the input terminal where the control voltage is applied. The operating frequency is determined by the circuit resistor and ca

A voltage controlled oscillator circuit is disclosed. A CMOS circuit version is detailed. A relaxation oscillator has its input coupled by way of a voltage follower buffer to the input terminal where the control voltage is applied. The operating frequency is determined by the circuit resistor and capacitor values along with the control potential. A linear frequency versus voltage response is obtained and the circuit will operate at low supply voltages.

대표청구항 ▼

A voltage controlled oscillator circuit having an input terminal to which a frequency controlling voltage can be applied and an output terminal at which an oscillatory signal appears, said circuit comprising: first and second supply terminals connectible to a source of operating power; a relaxation

A voltage controlled oscillator circuit having an input terminal to which a frequency controlling voltage can be applied and an output terminal at which an oscillatory signal appears, said circuit comprising: first and second supply terminals connectible to a source of operating power; a relaxation oscillator including high and low comparators coupled to drive the R and S inputs of an RS flip-flop having an output terminal which constitutes said circuit output terminal, said relaxation oscillator having a control input terminal and a feedback input terminal; said relaxation oscillator further including a frequency determining capacitor coupled between said feedback input terminal and one of said supply terminals and a frequency determining resistor coupled between said relaxation oscillator output and feedback input terminals whereby said relaxation oscillator will oscillate to charge and discharge said capacitor; and a voltage follower buffer coupled between said circuit input terminal and said control input terminal of said relaxation oscillator.