Control of body effect in MOS transistors by switching source-to

Details Control of body effect in MOS transistors by switching source-to Control of body effect in MOS transistors by switching source-to

1996-12-17

1998-07-28

Munson, Gene M.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327333, 327543, 327546, H03K 5003

Patent

active

057867240

ABSTRACT:
A voltage level shifting circuit (FIG. 4) has a plurality of PMOS transistors M.sub.1, M.sub.2, M.sub.3 connected in parallel for respectively driving a capacitive load C.sub.L with a selected different voltage level V.sub.1, V.sub.2 or V.sub.3. Transistors M.sub.1, M.sub.2, M.sub.3 are controlled so that one of them is placed in the ON condition, with the others in the OFF condition, to connect one of the voltages V.sub.1, V.sub.2 or V.sub.3 to charge the load CL. The largest voltage transistor M.sub.3 has its body connected to its source. The lower voltage transistors M.sub.1, M.sub.2 have their bodies respectively connected to switches S.sub.1, S.sub.2, which connect the bodies to the sources when the transistors are placed in the ON condition and connect the bodies to the highest voltage V.sub.3 when the transistors are placed in the OFF condition.

REFERENCES:
patent: 3916430 (1975-10-01), Heuner et al.
patent: 3976984 (1976-08-01), Hirasawa
patent: 5552723 (1996-09-01), Shigehara et al.

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