JPS6430312A - Amplifier - Google Patents
AmplifierInfo
- Publication number
- JPS6430312A JPS6430312A JP18714287A JP18714287A JPS6430312A JP S6430312 A JPS6430312 A JP S6430312A JP 18714287 A JP18714287 A JP 18714287A JP 18714287 A JP18714287 A JP 18714287A JP S6430312 A JPS6430312 A JP S6430312A
- Authority
- JP
- Japan
- Prior art keywords
- attenuating
- executed
- internal resistance
- signal power
- input
- 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
Landscapes
- Networks Using Active Elements (AREA)
- Control Of Amplification And Gain Control (AREA)
- Attenuators (AREA)
Abstract
PURPOSE:To realize the input/output matching and the low distortion at the time of attenuating a gain by inserting a high frequency attenuator composed of a diode into the front step of a wide band amplifier. CONSTITUTION:To the front step of a wide band amplifier, a high frequency attenuator with diodes 102-104 is connected. When an input signal power is minimum, a certain extent of the current flows from an attenuating quantity control terminal 120 to a ground 123, and thus, the internal resistance value of the diode 102 is lowered and the attenuating quantity is made minimum, and reversely, when an input signal power is maximum, the current is made minimum, the internal resistance is raised and the attenuating quantity is made maximum. Usually, the condition between these is obtained, and the attenuation in accordance with the input signal power is executed. The input output impedance matching is executed by controlling the voltage of an impedance control terminal 119, changing the current quantity to flow at diodes 103 and 104 and changing the internal resistance. Thus, the input output matching is kept and the attenuation can be executed without generating the high order distortion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187142A JPH0744413B2 (en) | 1987-07-27 | 1987-07-27 | amplifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62187142A JPH0744413B2 (en) | 1987-07-27 | 1987-07-27 | amplifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6430312A true JPS6430312A (en) | 1989-02-01 |
JPH0744413B2 JPH0744413B2 (en) | 1995-05-15 |
Family
ID=16200856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62187142A Expired - Lifetime JPH0744413B2 (en) | 1987-07-27 | 1987-07-27 | amplifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0744413B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6331804B1 (en) | 1999-01-19 | 2001-12-18 | Matsushita Electric Industria, Co., Ltd. | Amplifier and radio communication apparatus using the same |
JP2011184843A (en) * | 2010-03-11 | 2011-09-22 | Hideo Kamiya | Glove with pocket |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4873045A (en) * | 1971-12-28 | 1973-10-02 | ||
JPS49103351U (en) * | 1972-12-27 | 1974-09-05 | ||
JPS50111969A (en) * | 1974-02-09 | 1975-09-03 | ||
JPS5140245U (en) * | 1974-09-20 | 1976-03-25 | ||
JPS6064625U (en) * | 1983-10-06 | 1985-05-08 | シャープ株式会社 | Gain control circuit |
JPS644122A (en) * | 1987-06-26 | 1989-01-09 | Nec Corp | Variable gain antenna |
-
1987
- 1987-07-27 JP JP62187142A patent/JPH0744413B2/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4873045A (en) * | 1971-12-28 | 1973-10-02 | ||
JPS49103351U (en) * | 1972-12-27 | 1974-09-05 | ||
JPS50111969A (en) * | 1974-02-09 | 1975-09-03 | ||
JPS5140245U (en) * | 1974-09-20 | 1976-03-25 | ||
JPS6064625U (en) * | 1983-10-06 | 1985-05-08 | シャープ株式会社 | Gain control circuit |
JPS644122A (en) * | 1987-06-26 | 1989-01-09 | Nec Corp | Variable gain antenna |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6331804B1 (en) | 1999-01-19 | 2001-12-18 | Matsushita Electric Industria, Co., Ltd. | Amplifier and radio communication apparatus using the same |
JP2011184843A (en) * | 2010-03-11 | 2011-09-22 | Hideo Kamiya | Glove with pocket |
Also Published As
Publication number | Publication date |
---|---|
JPH0744413B2 (en) | 1995-05-15 |
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