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Title:
ACTIVITY DETECTOR CIRCUIT
Document Type and Number:
WIPO Patent Application WO2003081573
Kind Code:
A3
Abstract:
An activity detection system for use with a signal having a high value and a low value has a differential amplifier (102, 104), a filter (106) and a comparator (108) configured to compare a signal to a threshold value and determine if the threshold value is above the signal, below the signal or in between the high and low values of the signal.

Inventors:
GAHLSDORF RIEN (US)
KIAMILEV FOUAD (US)
Application Number:
PCT/US2003/008007
Publication Date:
July 29, 2004
Filing Date:
March 18, 2003
Export Citation:
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Assignee:
XANOPTIX INC (US)
GAHLSDORF RIEN (US)
KIAMILEV FOUAD (US)
International Classes:
H03K5/08; H03K5/153; H03K5/19; G01R19/165; (IPC1-7): H03K5/22
Foreign References:
US6518880B22003-02-11
US6177815B12001-01-23
US6166649A2000-12-26
US4491968A1985-01-01
US4333050A1982-06-01
US4307389A1981-12-22
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