PLL manufacturing test apparatus

Details PLL manufacturing test apparatus PLL manufacturing test apparatus

2006-06-13

2006-06-13

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

C327S157000, C331S17700V

Reexamination Certificate

active

07061223

ABSTRACT:
A method and an apparatus for testing a phase-locked loop (PLL) are provided. A fixed-level reference clock signal and a test feedback clock signal are applied to a phase-frequency detector (PFD) of the PLL to measure a minimum output frequency of a voltage-controlled oscillator (VCO) of the PLL. A test reference clock signal and a fixed-level feedback clock signal are applied to the PFD to measure a maximum output frequency of the VCO. The lock and capture range of the PLL is determined based on the maximum and minimum frequencies of the VCO.

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