Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-12-15
1999-03-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327542, 327543, 323313, G05F 110, G05F 3316
Patent
active
058806199
ABSTRACT:
A voltage splitter circuit (100) that generates a one-half supply voltage includes a first switched operational transconductance amplifier (switched OTA) (120), a first transistor switch (110) that is controlled by a first clock signal (108) to periodically switch a first supply voltage (135) to a non-inverting input (118) of the first switched OTA, a second switched OTA (115), a second transistor switch (105) that is controlled by an inverted second clock signal (104) to periodically switch a second supply voltage (130) to a non-inverting input (114) of the second switched OTA, a commutating capacitor (112) coupled between the non-inverting input of the first switched OTA and the non-inverting input of the second switched OTA, a first filter capacitor (145) coupled to an output (121) of the first switched OTA, a second filter capacitor (140) coupled to an output (116) of the second switched OTA, and a third switched OTA (125). The first and second clock signals are non-overlapping.
REFERENCES:
patent: 5047727 (1991-09-01), Theus
patent: 5111154 (1992-05-01), Nakagawara
patent: 5789973 (1998-08-01), Barrett, Jr. et al.
Barrett, Jr. Raymond Louis
Herold Barry W.
Pajunen Grazyna A.
Callahan Timothy P.
Englund Terry L.
Lamb James A.
Motorola Inc.
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