Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2011-05-03
2011-05-03
Nguyen, Hai L (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S091000
Reexamination Certificate
active
07936187
ABSTRACT:
A sample-and-hold feed switch has parallel PMOS branches and parallel NMOS branches, each extending from an input node to an output node connected to a hold capacitor. Each PMOS branch has a PMOS switch FET connected to a matching PMOS dummy FET, and each NMOS branch has an NMOS switch FET connected to a matching NMOS dummy FET. A sample clock switches the PMOS switch FETs on and off, and a synchronous inverse sample clock effects complementary on-off switching of the PMOS dummy FETs. Concurrently, a synchronous inverse sample clock switches the NMOS switch FETs on and off, and the sample clock effects a complementary on-off switching of the NMOS dummy FETs. A bias sequencer circuit biases the bodies of the PMOS switch FETs and the bodies of the PMOS dummy FETs, in a complementary manner, and biases the NMOS switch FETs and the NMOS dummy FETs, also in a complementary manner. The on-off switching of the PMOS dummy FETs injects charge, cancelling a charge injection by the PMOS signal switch FETs, and injects glitches cancelling glitches injected by the PMOS signal switch FETs. The on-off switching of the NMOS dummy FETs injects charge that cancels a charge injection by the NMOS signal switch FETs, and injects glitches that cancels glitches injected by the NMOS signal switch FETs.
REFERENCES:
patent: 4308468 (1981-12-01), Olson
patent: 5019731 (1991-05-01), Kobayashi
patent: 5111072 (1992-05-01), Seidel
patent: 6265911 (2001-07-01), Nairn
patent: 7015729 (2006-03-01), Tursi et al.
patent: 7119585 (2006-10-01), Ranganathan
Mahooti Kevin
Wu Qiong
Nguyen Hai L
NXP B.V.
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