Voltage control circuit

  • Inventors:
  • Assignees: Ricoh Elemex Corp
  • Publication Date: December 09, 1981
  • Publication Number: JP-S56159715-A

Abstract

PURPOSE:To perform DC transformation to an optional voltage without any unnecessary power consumption through simple constitution by continuously alternating the charging loop and discharging loop of a capacitor via an electronic switch. CONSTITUTION:An input clock signal phi drives electronic switches S1 and S2 via an inverter INV1 and a two-stage C-MOS circuit. As an output voltage VOUT rises, the rising and falling of a delay circuit composed of a resistance RD and capacitor CD become sharp, so the output pulse widths of the NAND gate and NOR gate of a voltage detecting circuit 11 decrease. As a result, the charge time of a capacitor CT by electronic switches S1 and S2 is shortened, and consequently the transfer of charge becomes deficient, so that the output voltage VOUT falls.

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