Low voltage low power crystal oscillator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 22, 2002
Grant Date -
N/A
app pub date -
Apr 12, 2000
filing date -
Feb 23, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oscillator is provided with an inverter, a quartz crystal, a voltage source, an upper clamper, a ground node, a lower clamper, and a feedback-controlled switch. The inverter is connected in parallel to the quartz crystal having a crystal input and a crystal output. The upper damper is connected between the inverter and the voltage source. The lower damper is connected between the inverter and the ground node. The feedback-controlled switch has a pair of switch control nodes connected to the crystal input, a switch input connected to the crystal output, and a switch output connected to the upper damper and the lower clamper. The potential at the switch output is determined by voltage levels at the switch control nodes and the switch input in order to control the upper damper and the lower damper while oscillating.
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