Invention Grant
- Patent Title: Time delay apparatus and method of using same
- Patent Title (中): 时延装置及其使用方法
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Application No.: US12156266Application Date: 2008-05-31
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Publication No.: US07667515B1Publication Date: 2010-02-23
- Inventor: Ken Elliott , Susan Morton , Mark Rodwell
- Applicant: Ken Elliott , Susan Morton , Mark Rodwell
- Applicant Address: US CA Malibu
- Assignee: HRL Laboratories, LLC
- Current Assignee: HRL Laboratories, LLC
- Current Assignee Address: US CA Malibu
- Agency: Tope-McKay & Assoc.
- Main IPC: H03H11/26
- IPC: H03H11/26

Abstract:
Disclosed is a time delay generator 200 apparatus and method. The apparatus includes a time delay gate 212, a mixer 216 (a Gilbert cell circuit), and a current digital to analog converter 206. The mixer 216, comprised of first and second transistor differential pairs 218 and 220, receives an analog input signal 202 without a delay as well as a delayed input signal 210 produced by the time gate delay. The digital to analog converter regulates the relative current flow between a first control signal 232 and a second control signal 238, effectively altering the mixing of the undelayed input signal 208 and the delayed input signal 210 to generate a delayed output signal 214 with a time or phase delay substantially equal to the temporal delay represented by the digital signal input 204. The time delay generator exhibits reduced phase noise and a linear time delay response.
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