JPS6413802A - Level adjusting circuit - Google Patents
Level adjusting circuitInfo
- Publication number
- JPS6413802A JPS6413802A JP17059487A JP17059487A JPS6413802A JP S6413802 A JPS6413802 A JP S6413802A JP 17059487 A JP17059487 A JP 17059487A JP 17059487 A JP17059487 A JP 17059487A JP S6413802 A JPS6413802 A JP S6413802A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pilot signal
- gain
- amplifiers
- fed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To suppress the variation in a gain among channels by adding a pilot signal varying inversely proportional to the gain of a gain control amplifier receiving a main control signal to an input signal. CONSTITUTION:A pilot signal from a pilot signal generating circuit 11 is fed to an amplifier 12, from which a pilot signal varying inversely proportional to the gain of an amplifier 4a controlled by a signal fed from a terminal 9 is formed. The pilot signal is added to the input signal by an adder 2 and fed to amplifiers 4a, 4b, 4c via signal processing circuits 3a, 3b, 3c of each channel. Then the level of the pilot signal in the output signal of the amplifiers is detected by pilot signal detection circuits 6a, 6b, 6c and the gain of the amplifiers 4b, 4c is controlled based on the difference between the output of the circuit 6a obtained by the comparators 7, 8 and being a reference and the output of the other circuits 6b, 6c.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17059487A JP2623577B2 (en) | 1987-07-08 | 1987-07-08 | Level adjustment circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17059487A JP2623577B2 (en) | 1987-07-08 | 1987-07-08 | Level adjustment circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6413802A true JPS6413802A (en) | 1989-01-18 |
JP2623577B2 JP2623577B2 (en) | 1997-06-25 |
Family
ID=15907734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17059487A Expired - Fee Related JP2623577B2 (en) | 1987-07-08 | 1987-07-08 | Level adjustment circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2623577B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6690921B1 (en) * | 1999-09-01 | 2004-02-10 | Matsushita Electric Industrial Co., Ltd. | Receiving apparatus, base station apparatus using same and radio communication system |
JP2007189385A (en) * | 2006-01-12 | 2007-07-26 | Mitsubishi Materials Corp | Antenna system |
US8564477B2 (en) | 2008-03-31 | 2013-10-22 | Kyocera Corporation | High-frequency module and method of manufacturing the same, and transmitter, receiver, transceiver, and radar apparatus comprising the high-frequency module |
-
1987
- 1987-07-08 JP JP17059487A patent/JP2623577B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6690921B1 (en) * | 1999-09-01 | 2004-02-10 | Matsushita Electric Industrial Co., Ltd. | Receiving apparatus, base station apparatus using same and radio communication system |
JP2007189385A (en) * | 2006-01-12 | 2007-07-26 | Mitsubishi Materials Corp | Antenna system |
US8564477B2 (en) | 2008-03-31 | 2013-10-22 | Kyocera Corporation | High-frequency module and method of manufacturing the same, and transmitter, receiver, transceiver, and radar apparatus comprising the high-frequency module |
Also Published As
Publication number | Publication date |
---|---|
JP2623577B2 (en) | 1997-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |