JPS6477154A - Semiconductor integrated circuit device - Google Patents

Abstract

PURPOSE:To exclude a parasitic current so as to decrease the power loss of the whole system, and improve a device in a noise resistant property by a method wherein a junction isolated substrate of an integrated circuit is made to be insulated from a ground potential and a negative voltage generated by pulses from a power source is made to be impressed onto a substrate using a differential circuit, a rectifying circuit, and a charging circuit of the same integrated circuit semiconductor element. CONSTITUTION:A condenser CHV is made to be connected with a constant voltage power source VDD or a high voltage power source VDH which supplies a clock pulse through the intermediary of a terminal 91. A transistor Q, which is made to be on being supplied with a base current from a constant voltage power terminal 93 through the intermediary of a resistor RB, functions so as to form a rectified waveform out of a differential waveform obtained from a differential circuit which is composed of CHV and R. A diode D removes a positive component contained in a rectified waveform and a negative voltage of -3 or -5 volts, for example, is generated at a terminal 94 connected with an anode 73. A substrate 1 is made to be kept at a negative potential by applying the above negative voltage to an electrode of the substrate 1 through a condenser CSUB.