Fractional synthesizer comprising a phase jitter compensation
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United States of America Patent
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-
Apr 8, 2003
Grant Date -
Jan 31, 2002
app pub date -
Apr 9, 2001
filing date -
Apr 11, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The multiple fractional division frequency synthesizer includes a frequency generator, a voltage-controlled oscillator, a programmable variable N-divider, a phase comparator, an integration and filter circuit, a time window generator, a weighted current source, a phase accumulator, and a charge-pump circuit including plural transistors. The current source is connected to the charge-pump circuit to directly switch currents over to the emitter of one or more of the plural transistors of the charge-pump circuit.
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