Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-10-15
1998-08-04
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327530, 327543, 323313, G05F 110
Patent
active
057899720
ABSTRACT:
An inverter receives an energizing voltage with a particular magnitude (e.g. 1.5 V) at a first terminal and produces the voltage at a second terminal. The received and produced voltages are differentially introduced to a stage which produces a single-ended bias voltage (e.g. 3 V) related to the second terminal voltage. The bias voltage is servoed to regulate the second terminal voltage (e.g. 1.5 V) and the bias voltage (e.g. 3 V) regardless of energizing voltage variations. In response to the bias voltage and a variable input voltage, a pass transistor in a buffer produces a first control voltage different from the bias voltage by the pass transistor threshold voltage for input voltages greater than the bias voltage less the pass transistor threshold. The first control voltage corresponds to the input voltage for input voltages less than the bias voltage less the pass transistor threshold. The first control voltage is inverted to produce a second control voltage having the first control voltage amplitude for small amplitude values of the first control voltage and having transition times and amplitudes of the first control voltage for large amplitude values of the first control voltage. A circuit differentially responds to the control voltages to produce an output voltage which rises and falls in accordance with the variations in the input voltage. The output voltage is servoed to limit the rises and falls. The output voltage has substantially the same wave shape, and substantially the same delay relative to the input voltage, for rising and falling values.
REFERENCES:
patent: 4008418 (1977-02-01), Murphy
patent: 4393346 (1983-07-01), Jones et al.
patent: 5038055 (1991-08-01), Kinoshita
patent: 5079497 (1992-01-01), Barbu et al.
patent: 5130635 (1992-07-01), Kase
patent: 5394026 (1995-02-01), Yu et al.
patent: 5578960 (1996-11-01), Matsumura et al.
Brooktree Corporation
Callahan Timothy P.
Cray William C.
Kim Jung Ho
Oh Susie H.
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