Method to improve high frequency divider bandwidth coverage

Details Method to improve high frequency divider bandwidth coverage Method to improve high frequency divider bandwidth coverage

2007-06-19

2007-06-19

Chang, Joseph (Department: 2817)

Oscillators

Combined with particular output coupling network

C331S051000, C331S076000, C327S115000, C327S117000

Reexamination Certificate

active

11041549

ABSTRACT:
A divider for a local oscillator (LO) generator system of a phase locked loop (PLL) in a transceiver chip. The divider includes at least one divider unit. Each divider unit includes a frequency divider unit for receiving an input signal having an input frequency and for outputting an output signal having an output frequency which is approximately one half of the input frequency. Each divider unit also includes a resistor bank coupled between a voltage source and the frequency divider unit, and a current stirring unit for supplying current to the frequency divider unit. The resistance of the resistor bank and a magnitude of the current supplied by the current stirring unit are variable depending on the input frequency.

REFERENCES:
patent: 2002/0097072 (2002-07-01), Wakada et al.
patent: 2004/0263143 (2004-12-01), Lee

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