Transmission signal output control circuit
US5367268A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a transmission signal output control circuit which is formed of an RF amplifier circuit for supplying an amplified RF transmission signal to an antenna circuit; a detector connected to the RF amplifier to detect a transmission signal output level of the RF amplifier; a reference signal generation circuit for generating a reference signal having a selectively changeable signal level; a transmission signal output level control circuit for comparing an output of the detector with the reference signal to thereby supply a control signal to the RF amplifier to thereby control an amplification degree of the RF amplifier to make the RF amplifier produce an RF transmission signal level corresponding to the selected signal level of the reference signal; and a DC bias supply circuit connected to the detector a high-frequency choke coil which has an inductance value selected to cooperate with an intrinsic electrostatic capacitance value of the detector to provide parallel resonance at a frequency of the RF transmission signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.