Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2000-10-23
2001-10-02
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S170000, C327S183000, C327S561000
Reexamination Certificate
active
06297676
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to signal processing and, more specifically, to electronic amplifiers.
2. Description of the Prior Art
Amplification circuits, such as those used with wireless communications equipment, are frequently called on to charge and discharge large capacitive loads. If a fast slew rate is required of the amplification circuit, then the output stage typically experiences a significant voltage drop. Such amplification circuits also typically draw a significant bias current relative to slewing current, giving rise to a low bias efficiency. Furthermore, some amplification circuits give rise to transmission line effects, such as ringing, when driving large capacitive loads.
Therefore, there is a need for a nearly rail-to-rail amplification circuit with a high bias efficiency.
REFERENCES:
patent: 4167711 (1979-09-01), Smoot
patent: 5343084 (1994-08-01), Gens
patent: 5744878 (1998-04-01), Wachter et al.
Nag Manbir
Parkes John J.
Simmons John W.
Callahan Timothy P.
Dulaney Randi L.
Luu An T.
Motorola Inc.
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