Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2006-01-31
2006-01-31
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S170000
Reexamination Certificate
active
06992511
ABSTRACT:
There is provided an output buffer circuit which can realize high speed voltage transition of an output signal while generation of noise due to signal transition is suppressed. On the occasion of driving a PMOS transistor P1, in the period of the state I, when the NMOS transistor N11and NMOS transistors N12, N13are turned ON, voltage of the output stage PMOS gate terminal AP1is sharply dropped and the PMOS transistor P1is turned ON. While the signal is propagated in the shortest delay time to the circuit of next stage, when the NMOS transistor N11and NMOS transistor N12are turned ON in the state II, disturbance of signal waveform can be suppressed by limiting a through-rate of the voltage drop of the output stage PMOS gate terminal AP1. Driving capability of the PMOS transistor P1can be variably controlled by controlling the bias condition of a control signal AP1by switching, for every state, the NMOS transistors N12to N14which are turned ON.
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patent: 5923192 (1999-07-01), Hasegawa
patent: 6051995 (2000-04-01), Pollachek
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patent: 04-192808 (1992-07-01), None
patent: 06-112780 (1994-04-01), None
patent: 09-284111 (1997-10-01), None
Arent & Fox PLLC
Nguyen Long
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