Oscillator for changing frequency of output signal in inversely proportional to power source voltage

摘要

An oscillator to be inversely proportional to the supply voltage varies the frequency of the output signal is disclosed. Oscillator to be inversely proportional to the power supply voltage according to the invention varies the frequency of the output signal is, in the oscillator in response to a pulse input signal for generating a pulse output signal having a predetermined frequency, a comparison voltage generating unit, a comparison unit, and a clock It characterized in that it comprises a switching unit. Comparison voltage generating portion is driven by a predetermined power supply voltage, and generating a comparison voltage that varies in response to a predetermined clock signal and the first reference voltage. Comparing unit compares the comparison voltage and the second reference voltage and outputs a logic signal having a predetermined logic level as a result of the comparison. A clock switching unit in response to the logic signals and outputs the clock signal having a frequency inversely proportional to the supply voltage.; Oscillator to be inversely proportional to the power supply voltage according to the invention varies the frequency of the output signal has the advantage of reducing the current consumption of the entire system including the oscillator.