Communication semiconductor integrated circuit device for...

Details Communication semiconductor integrated circuit device for... Communication semiconductor integrated circuit device for...

2007-01-11

2008-11-11

Jackson, Blane J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S114200, C375S327000

Reexamination Certificate

active

07450921

ABSTRACT:
The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission spectrum, and thereby enhances the accuracy of an oscillation frequency. The integrated circuit corrects a dispersion of the KV characteristic of the transmission oscillator by calibrating a current Icp of the charge pump inside the phase control loop. More in concrete, the integrated circuit measures a KV value Kv of the transmission oscillator, and calibrates the current Icp of the charge pump so that Kv·Icp falls into a predetermined value.

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P. Kenington, “High Linearity RF Amplifier Design”, ARTECH House Inc., 1979, pp. 160-165.

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