Pulse or digital communications – Testing – Phase error or phase jitter
Reexamination Certificate
2005-12-07
2010-06-29
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Testing
Phase error or phase jitter
Reexamination Certificate
active
07746922
ABSTRACT:
Wireless devices transmit and receive radio signals based upon reference frequencies generated by crystal oscillators. If the reference frequencies of the transmitter and the receiver are different, the radio signals may not be received properly or may not be received at all. A measurement circuit measures the amount of error or signal corruption in the radio signals due to the reference frequency offset between the transmitter and the receiver. A frequency offset circuit generates an offset operating frequency in the transmitter or the receiver to align or calibrate the operating frequencies of the devices.
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Gehring Mark R.
Wright David
Ahn Sam K
Cypress Semiconductor Corporation
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