Sampler blocker protected against switching parasites

Details Sampler blocker protected against switching parasites Sampler blocker protected against switching parasites

2011-06-21

2011-06-21

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S052000, C327S053000, C327S096000, C330S252000, C330S260000

Reexamination Certificate

active

07965110

ABSTRACT:
The invention relates to sample-and hold modules, and notably those which are intended to be placed upstream of an analog-digital converter. The sample-and-hold module conventionally comprises a differential pair of transistors, a follower transistor and a storage capacitor. The follower transistor is turned on during a sampling phase by the application of an emitter current by means of a first current switch and can be disabled during a hold phase by the application of a disabling voltage to its base. The sample-and-hold module operates according to the invention with a hold phase beginning at the same time as the end of a sampling phase and terminating before the start of a new sampling phase. Switching spikes are thus avoided at the transition between the end of a hold phase and the start of a new sampling phase.

REFERENCES:
patent: 5457418 (1995-10-01), Chang
patent: 2005/0035791 (2005-02-01), Devendorf et al.
patent: 1 074 996 (2001-02-01), None
patent: 01/73789 (2001-10-01), None

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