Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1995-02-27
2000-11-21
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327112, 327309, 330262, H03K 300
Patent
active
061508535
ABSTRACT:
The operation of externally connected output power transistors of a class AB amplifier is controlled without employing any external sensing resistance of the output current by driving an externally connected power transistor through a level shifting buffer and employing a limiting network composed of an integrated transistor driven by the output of a signal amplifying stage and a resistance connected in series with its drain. The buffer stage shifts the level of the driving signal of the external power transistor by a value equal to the threshold voltage of the integrated transistor of the limiting network thus ensuring the turn-off of the external power transistor under quiescent conditions.
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IEEE Transactions On Consumer Electronics, vol. 38, No. 3, pp. 217-222. Aug., 1992.
Chrappan Francesco
Nessi Maurizio
Salina Alberto
Galanthay Theodore E.
SGS--Thomson Microelectronics S.r.l.
Wells Kenneth B.
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