Coherent demodulation with reduced latency adapted for use...

Details Coherent demodulation with reduced latency adapted for use... Coherent demodulation with reduced latency adapted for use...

2008-11-26

2010-11-30

Petkovsek, Daniel (Department: 2874)

Optical: systems and elements

Optical demodulator

Reexamination Certificate

active

07843627

ABSTRACT:
A signal demodulator and the method of using the same in a scanning probe microscope or the like to provide a feedback path with reduced latency are disclosed. The demodulator includes an input port, a first mixer and a first integrator. The input port receives an input signal having a frequency component at a signal frequency. The input signal is characterized by a signal amplitude at that frequency. The first mixer mixes the input signal with a first local oscillator signal at the signal frequency to generate a first mixed signal. The first integrator integrates the first mixed signal for an integer number of periods of the signal frequency to provide a first output signal.

REFERENCES:
patent: 4488119 (1984-12-01), Marshall
patent: 5917441 (1999-06-01), Valentine et al.
patent: 6114971 (2000-09-01), Nysen
patent: 6463091 (2002-10-01), Zhodzicshsky et al.
patent: 6633226 (2003-10-01), Nysen

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