Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-06-20
1999-11-09
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
363 60, H03L 100
Patent
active
059822236
ABSTRACT:
A voltage pump circuit includes a native MOS device coupled as a charge transfer device (M1) between input and output stage nodes. A parallel-coupled MOS pair (M2, M3) is coupled between drain (input node) and source (output node) of the charge transfer device, in which M3 is configured as a diode. A clock generator outputs at least three non-overlapping phase signals: .phi.1 (which goes high at t1 and low at t6), .phi.2 (which goes high at t3 and low at t4), .phi.3 (which goes low qt t2 and high at t5). The t1 .phi.1 positive transient is AC-coupled to M1's drain, and a smaller fraction of the transient is coupled to M1's gate, precharging M1, which begins to turn-on. The .phi.3 t2 negative transient is AC-coupled to M1's source, increasing M1 gate-source potential, which more fully turns-on M1. The .phi.2 t3 positive transient is coupled to M1's gate, turning-on M1 very hard. A phase clock generator outputting square-wave, same-frequency signals having respective 90.degree. phase shifts that are frequency independent can be used to drive pump circuits and sequentially operated groups of pump circuits.
REFERENCES:
patent: 5734290 (1998-03-01), Chang et al.
patent: 5818289 (1998-10-01), Chevallier et al.
Hung Hsi-Hsien
Park Eung Joon
Integrated Silicon Solution Inc.
Wells Kenneth B.
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