Sensing circuitry and method of detecting a change in...

Details Sensing circuitry and method of detecting a change in... Sensing circuitry and method of detecting a change in...

2007-06-15

2008-11-11

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S051000, C327S052000, C327S055000, C327S056000, C365S205000, C365S207000

Reexamination Certificate

active

07449922

ABSTRACT:
Sensing circuitry and a method of operating such sensing circuitry are provided. The sensing circuitry has voltage change detection circuitry for detecting a change in voltage on at least one input line and for producing at least one output signal indicative of that change during a sensing stage of operation. The voltage change detection circuitry comprises at least one latch transistor having a body region insulated from a substrate. Further, body biasing circuitry is provided which, prior to the sensing stage of operation, causes a voltage to be applied to the body region that is derived from the voltage on one of said at least one input lines. Then, during the sensing stage of operation, the body biasing circuitry causes the voltage of the body region to float. Such an arrangement enables removal of the history effect that can sometime affect such latch transistors, whilst alleviating power consumption and noise issues that can occur in certain known sensing circuits.

REFERENCES:
patent: 6433589 (2002-08-01), Lee
patent: 7046045 (2006-05-01), Nakazato et al.
patent: 7400525 (2008-07-01), Kim
patent: 2005/0264324 (2005-12-01), Nakazato et al.

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