Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-12-03
1999-03-16
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327543, 327544, 327546, 36518909, H03K 1730
Patent
active
058835440
ABSTRACT:
An integrated circuit includes a plurality of MOSFETs having channels of a first conductivity type, and having active control of an effective threshold voltage of the MOSFETs to be less than an absolute value of an initial threshold voltage. In this embodiment, a first MOSFET has a channel of the first conductivity type, and a second MOSFET is connected to the first MOSFET and has a channel of a second conductivity type. The second MOSFET is preferably biased to a pinch-off region and cooperates with the first MOSFET for generating a control signal related to an effective threshold voltage of the first MOSFET. Moreover, the circuit preferably generates a bias voltage to the plurality of MOSFETs and to the first MOSFET based upon the control signal to set an effective threshold voltage of the plurality of MOSFETs to have an absolute value less than an absolute value of the initial threshold voltage and, more preferably, to a reference voltage. Accordingly, lower supply voltages can be readily accommodated. In another embodiment, the biasing is only provided to activated circuit portions.
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Chan Tsiu Chiu
So Jason Siucheong
Callahan Timothy P.
Englund Terry L.
Galanthay Theodore E.
Jorgenson Lisa K.
Regan Christopher F.
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