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US 6,617,837 B1Granted
Frequency locked loop speed up
Assignee3Com Corporation
InventorsBrewster T. Hudson, Anthony Eugene Zortea
Life of this patent
Estimating the term…
Abstract
A method is provided for testing a communication circuit. Power is applied to a clock recovery circuit. A precharge bit is provided to the clock recovery circuit after applying power to the clock recovery circuit. A predetermined number of pulses is provided to a charge pump coupled to a voltage controlled oscillator to initialize the voltage controlled oscillator to near an operating frequency.
Claims10
A method for testing a communication circuit comprising:
- a) applying power to the clock recovery circuit
- b) providing a precharge bit to the clock recovery circuit after applying power to the clock recovery circuit;
- and
- c) providing a predetermined number of pulses to a charge pump coupled to a voltage controlled oscillator to initialize the voltage controlled oscillator to near an expected operating frequency, the predetermined number of pulses being provided external to the communication circuit.
1 more element
Dependencies are inferred from the claim text.