Title:
HIGH FREQUENCY OUTPUT LEVEL CORRECTION CIRCUIT
Document Type and Number:
Japanese Patent JP3649579
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To control the high frequency output level of a wide band transmitter for sending many frequency signals by simple constitution.
SOLUTION: In a high frequency output level correction circuit for previously detecting an output level signal to be a reference for a transmission power amplifier 3 by a detection circuit 2, rectifying the signal, storing the rectified signal in a reference level storing part 8, and at the time of real operation, detecting an output from the amplifier 3, rectifying the detected signal and comparing the rectified signal with the reference level previously stored in the storing part 8 to control, the output level of the amplifier 3, a frequency conversion circuit is connected between the detection circuit 2 and a rectifier circuit 6. Or changed data in each application frequency are stored in the storing part 8, corrected by a correction part and compared with a reference level stored in a difference level storing part by a comparator 9 to control the output level of the amplifier 3 to a prescribed value.
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Inventors:
Masao Kanao
Application Number:
JP8962098A
Publication Date:
May 18, 2005
Filing Date:
April 02, 1998
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H04B1/04; (IPC1-7): H04B1/04
Domestic Patent References:
| JP4275721A | ||||
| JP4372227A | ||||
| JP1143428A |
Attorney, Agent or Firm:
Shizuo Sano
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