McClure, Qualey & Rodack, LLP
Frequency doubler using recirculating delay circuit and method thereof
A method of frequency doubling includes receiving a first clock that has a fifty percent duty cycle and is a two-phase clock having a first phase and a second phase; outputting a second clock using a multiplexer by selecting one of the first phase and the second phase of the first clock in accordance with a third clock; delaying the second clock into a fourth clock using a recirculating delay circuit; and using a divide-by-two circuit to output the third clock in accordance with the fourth clock.
REALTEK SEMICONDUCTOR CORP.
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Chia-Liang (Leon) Chinchi
Lin Chang