Low pass filter and lock detector circuit

Details Low pass filter and lock detector circuit Low pass filter and lock detector circuit

2011-01-25

2011-01-25

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S160000, C327S175000, C331SDIG002

Reexamination Certificate

active

07876148

ABSTRACT:
A low pass filter includes a driver unit configured to output a voltage proportional to an input pulse width, a charge/discharge unit configured to charge the output voltage of the driver unit, a comparator unit configured to compare an output voltage of the charge/discharge unit with a reference value to output a square wave signal, and a switching unit configured to switch the charge/discharge unit to an operation state, based on a bandwidth expansion signal.

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Notice of Allowance issued from Korean Intellectual Property Office on Apr. 30, 2009 with an English Translation.

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