Circuit for driving electronic devices with a low supply voltage

Details Circuit for driving electronic devices with a low supply voltage Circuit for driving electronic devices with a low supply voltage

1988-11-28

1990-02-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307571, 307 263, 307253, 307360, H03K 716, H03K 906

Patent

active

049048899

ABSTRACT:
A driving circuit comprising a low-voltage power supply line, a MOS transistor having a gate terminal and a drain terminal connected to a load and a control stage connected to the power supply line and to the gate terminal of the MOS transistor. In order to allow the MOS transistor to be switched on even when the voltage of the power supply line is lower than the threshold voltage of the MOS transistor, the driving circuit comprises a bipolar transistor connected in parallel to the MOS transistor and a voltage multiplier circuit connected between a common terminal of the MOS and bipolar transistors and the control stage. The control stage comprises comparators adapted to initially switch on the bipolar transistor so as to feed the multiplier circuit, which is thus capable of generating a voltage higher than the available supply voltage, and to subsequently switch off the bipolar transistor and switch on the MOS transistor when the voltage generated by the voltage multiplier has reached at least the threshold voltage of the MOS transistor.

REFERENCES:
patent: 4480200 (1984-10-01), Tan et al.
patent: 4524291 (1985-06-01), Lehning
IBM Tech. Disc. Bul., vol. 14, No. 4, 9/71, "Analog Switch", Buhler

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