RADIO RECEIVER SYSTEM
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United States of America Patent
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N/A
Issued Date -
May 21, 2009
app pub date -
Nov 21, 2007
filing date -
Nov 21, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An oscillation circuit for a radio receiver system. The oscillator circuit includes a tank circuit, a first and second transistor, and a first and second low pass filter. The first transistor forms a first current loop when the first transistor is active. Similarly, the second transistor forms a second current loop when the second transistor is active. The first low pass filter is connected in an electrical series connection within the first current loop and the second low pass filter is connected in an electrical series connection within the second current loop. As such, the first and second low pass filter serve to reduce the gain of the oscillator circuit below a secondary resonant frequency of the tank circuit to prevent an oscillation condition, thereby preventing unwanted oscillations at a secondary resonant frequency.
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