Invention Patent
- Patent Title: POWER CONTROL OF A DIRECT SEQUENCE CDMA RADIO
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Application No.: CA2086009Application Date: 1992-04-06
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Publication No.: CA2086009CPublication Date: 1996-05-14
- Inventor: VILMUR RICHARD J , METROKA MICHAEL P
- Applicant: MOTOROLA INC
- Assignee: MOTOROLA INC
- Current Assignee: MOTOROLA INC
- Priority: US70647991 1991-05-28
- Main IPC: H04B1/40
- IPC: H04B1/40 ; H03G3/20 ; H04B1/04 ; H04B7/005 ; H04B7/216 ; H04B7/26 ; H04J13/00 ; H04M11/00 ; H04J13/04
Abstract:
The power control apparatus of the present invention is comprised of a local oscillator signal path coupled to a mixer (106) through a variable attenuator (107) and an IF signal path coupled to the mixer (106) through two variable attenuators (108 and 109) coupled in series. The IF signal path attenuators (108 and 109) are controlled by digital control circuitry (111) while the local oscillator path attenuator (107) is controlled by the control circuitry through a level shifter (110). The power level of the signal generated by the mixing of these two signals is less than the conducted output of the radiotelephone's power amplifier.
Public/Granted literature
- CA2086009A1 POWER CONTROL OF A DIRECT SEQUENCE CDMA RADIO Public/Granted day:1992-11-29
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