Clock-controlled voltage-to-frequency converter

Details Clock-controlled voltage-to-frequency converter Clock-controlled voltage-to-frequency converter

H - Electricity

03

M

328/108, 354/81

H03M 1/52 (2006.01) H03K 7/06 (2006.01) H03M 1/00 (2006.01)

Patent

CA 1288165

ABSTRACT OF THE DISCLOSURE A clock-controlled voltage-to-frequency converter comprises a reference voltage source, an integrator for receiving the reference voltage and a variable input voltage and producing an output having a triangular waveform, the integrator including a capacitor which is charged at a rate proportional to the input voltage and discharged at a rate proportional to the difference between the reference voltage and the input voltage, the charging and discharging occurring during a time interval To, a clock pulse source for generating a continuous series of clock pulses, a counter responsive to the clock pulses for terminating the discharging of the capacitor and initiating the charging of the capacitor at a fixed time interval following termination of the charging of the capacitor, and a logic unit responsive to the output of the integrator for terminating the charging of the capacitor and initiating the discharging of the capacitor when the integrator output rises above a preselected threshold level, the time required for the capacitor to charge to the threshold level varying in accordance with the magnitude of the input voltage.

582238

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