Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2006-11-28
2009-02-17
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C326S063000, C326S081000
Reexamination Certificate
active
07492206
ABSTRACT:
A level shifter is disclosed and generates an output signal having a swing voltage shifted by a positive boost voltage with respect to an input signal. The level shifter comprises; an enable unit adapted to enable the output signal in response to the input signal, and a disable unit adapted to disable the output signal in response to the input signal. The enable unit comprises; a shifting voltage terminal adapted to receive the boost voltage, a control node, a shifting unit disposed between the shifting voltage terminal and the control node and responsive to the output signal, such that a voltage having a difference with the boost voltage lower than a voltage of the output signal is provided to the control node, whereby the output signal is boosted by the positive boost voltage, a control PMOS transistor disposed between the control node and the output signal and gated by the input signal, and bulk voltage generation unit adapted to generate a predetermined bulk voltage having a voltage difference with the boost voltage lower than that of the control node to a bulk of the control PMOS transistor.
REFERENCES:
patent: 5448198 (1995-09-01), Toyoshima et al.
patent: 6208200 (2001-03-01), Arakawa
patent: 7002400 (2006-02-01), Koo
patent: 10199976164 (1999-10-01), None
patent: 1020000044917 (2000-07-01), None
patent: 1020030079427 (2003-10-01), None
Choi Jung Dal
Park Ki Tae
Le Dinh T.
Samsung Electronics Co,. Ltd.
Volentine & Whitt PLLC
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