Device with an oscillator circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 15, 2000
Grant Date -
N/A
app pub date -
Feb 25, 1999
filing date -
Mar 4, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An oscillator circuit contains a switching circuit which periodically charges and discharges a capacitive node. The capacitive node is coupled to the input of the switching circuit via a loop circuit, so that signal transitions at the capacitive node travel through the loop circuit and cause new transitions. The oscillator contains a power supply current source and a mode breaker circuit which function to stabilize the oscillating frequency and to suppress spurious modes of operation, respectively. The mode breaker circuit contains a conduction path which is used to frustrate charging of the capacitive nodes in certain spurious signal configurations. To prevent the mode breaking function from interference between the stabilizing function, the mode breaker circuit is arranged so that it blocks the conduction path during the critical time-intervals when the loop operates in a desired mode.
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