Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1995-09-25
1997-11-11
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327379, 307130, H03K 1718, G05F 110
Patent
active
056868600
ABSTRACT:
An amplifier controller (104) is described for operating from a single voltage power supply (105). A switch (103) is coupled between the amplifier (102) and the power supply (105). The controller (104) includes a power conditioning circuit (106) for generating doubled and tripled voltages and positive and negative voltages for operating the controller (104) and the amplifier (102). Internal voltage regulators (138, 142) control the magnitude of the generated voltages. The controller (104) further includes: (i) a circuit (172) for disabling the controller (104) and amplifier (102) in response to an idle signal presented thereto, (ii) a circuit (178) for energizing the switch in response to a turn-on signal (128) so that the amplifier (102) can amplify, and (iii) a circuit (176) for sensing the presence or absence of negative polarity (Vss) on a second lead (188) of the amplifier (102) and, if not present, disabling the switch (103) despite the presence of the turn-on signal. The controller (104) can be integrated in a single IC.
REFERENCES:
patent: 4873453 (1989-10-01), Schmerda et al.
patent: 5254936 (1993-10-01), Leaf et al.
patent: 5264732 (1993-11-01), Fiorina et al.
patent: 5432501 (1995-07-01), Yoon
patent: 5444362 (1995-08-01), Chung et al.
patent: 5461338 (1995-10-01), Hirayama et al.
patent: 5483151 (1996-01-01), Yamashita
patent: 5534818 (1996-07-01), Peterson
patent: 5539353 (1996-07-01), Kajimoto et al.
Callahan Timothy P.
Dover Rennie William
Handy Robert M.
Motorola Inc.
Nu Ton My-Trang
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