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US 2002/0158623 A1Published application
Full wave envelope detector
AssigneeSiemens Milltronics Process Instruments, Inc.
InventorClaude Mercier
Life of this patent
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Abstract
An envelope detector for detecting the envelope of an input signal. The envelope detector includes an inverter for inverting the input signal and two offsetting circuits for offsetting the input signal and the inverted input signal so as to align the peaks of the signals with zero volts. The two offset signals are then summed, which results in a signal proportional to the inverted envelope of the input signal.
Claims10
An envelope detector for detecting an envelope of an input signal, said envelope detector comprising:
- (a) an input port for receiving the input signal;
- (b) a first inverter coupled to said input port for inverting the input signal and generating an inverted input signal;
- (c) an offset stage having a first offset circuit coupled to said input port for offsetting said input signal such that peaks in the input signal are aligned at zero volts, and a second offset circuit coupled to the output of said first inverter for offsetting said inverted input signal such that peaks in said inverted input signal are aligned at zero volts, said first offset circuit generating an offset input signal and said second offset circuit generating an offset inverted input signal;
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- (d) a summer circuit having an input coupled to the output of said first offset circuit and to the output of said second offset circuit for summing said offset input signal and said offset inverted input signal to generate, at an output port, a resultant signal corresponding to the envelope of said input signal.
2 more elements
Dependencies are inferred from the claim text.