JPS6448525A - Transmission panel - Google Patents
Transmission panelInfo
- Publication number
- JPS6448525A JPS6448525A JP20460987A JP20460987A JPS6448525A JP S6448525 A JPS6448525 A JP S6448525A JP 20460987 A JP20460987 A JP 20460987A JP 20460987 A JP20460987 A JP 20460987A JP S6448525 A JPS6448525 A JP S6448525A
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- attenuation
- amplifier system
- local oscillation
- local
- 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.)
- Pending
Links
Abstract
PURPOSE:To reduce the local leak at the lower level of an input signal by using 1st and 2nd attenuation means in combinations provided among an amplifier system of the input signal, a local oscillation means and a frequency converting means so as to control the leakage of a local oscillation frequency from the local oscillation means generated at the input level reduction of the microwave. CONSTITUTION:The 1st and 2nd attenuation means 30, 80 comprising an element whose impedance is changed by a bias current and varying its attenuation in response to the output level of a transmission panel 300a are provided respectively among the amplifier system of the input signal, the local oscillation means 70 and the frequency modulation means 20. If a gain reduction in each function block of the amplifier system arranged before the 1st attenuation means 30 and the input signal are reduced, the output of the local oscillation means 70 and the attenuation of the amplifier system of the input signal 1 are controlled by the same condition by means of the voltage obtained through the detection of the output. Thus, the local leak caused by the gain reduction of each function block of the amplifier system arranged before the 1st attenuation means 30 and the input signal is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20460987A JPS6448525A (en) | 1987-08-18 | 1987-08-18 | Transmission panel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20460987A JPS6448525A (en) | 1987-08-18 | 1987-08-18 | Transmission panel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448525A true JPS6448525A (en) | 1989-02-23 |
Family
ID=16493301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20460987A Pending JPS6448525A (en) | 1987-08-18 | 1987-08-18 | Transmission panel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448525A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02295257A (en) * | 1989-05-09 | 1990-12-06 | Nec Corp | Transmitter |
JPH05218885A (en) * | 1992-01-31 | 1993-08-27 | Nec Corp | Transmitting power controller |
-
1987
- 1987-08-18 JP JP20460987A patent/JPS6448525A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02295257A (en) * | 1989-05-09 | 1990-12-06 | Nec Corp | Transmitter |
JPH05218885A (en) * | 1992-01-31 | 1993-08-27 | Nec Corp | Transmitting power controller |
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