JPS56100531A - Frequency converting circuit - Google Patents
Frequency converting circuitInfo
- Publication number
- JPS56100531A JPS56100531A JP417480A JP417480A JPS56100531A JP S56100531 A JPS56100531 A JP S56100531A JP 417480 A JP417480 A JP 417480A JP 417480 A JP417480 A JP 417480A JP S56100531 A JPS56100531 A JP S56100531A
- Authority
- JP
- Japan
- Prior art keywords
- circuits
- gain
- input signal
- constant
- small
- 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
- 239000003990 capacitor Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
Landscapes
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
PURPOSE:To obtain a wide gain adjustment width, by making the characteristic of output current to the input signal into an operation characteristic nearly similar to DC to adjust the gain of the balanced mixer circuit by the receiving signal strength. CONSTITUTION:Transistors TRs Q6-Q11 constitute balanced mixer circuits respectively, and TRQ12 constitutes the constant-current source for these circuits. The constant-current value is determined by the base potential and resistance R2 and determines the gain of these circuits together with load impedance ZL consisting of capacitor C2 and coil L2. When the receiving signal is small, the automatic gain control signal applied to the base of TRQ4 is small, and these circuits have the gain determined by the constant-current value and impedance ZL. The receiving signal is applied to these circuits as it is. When the receiving signal becomes large and the automatic gain control signal becomes large, the gain of these circuits are lowered, and the input signal amplitude to circuits becomes narrow. When the input signal is larger furthermore, the input signal to these circuits becomes small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP417480A JPS56100531A (en) | 1980-01-17 | 1980-01-17 | Frequency converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP417480A JPS56100531A (en) | 1980-01-17 | 1980-01-17 | Frequency converting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56100531A true JPS56100531A (en) | 1981-08-12 |
| JPS6156904B2 JPS6156904B2 (en) | 1986-12-04 |
Family
ID=11577347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP417480A Granted JPS56100531A (en) | 1980-01-17 | 1980-01-17 | Frequency converting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56100531A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009531969A (en) * | 2006-03-29 | 2009-09-03 | トムソン ライセンシング | Frequency limiting amplifier for frequency conversion module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10887979B2 (en) | 2018-01-10 | 2021-01-05 | Hamilton Sunstrand Corporation | Low cycle fatigue prevention |
-
1980
- 1980-01-17 JP JP417480A patent/JPS56100531A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009531969A (en) * | 2006-03-29 | 2009-09-03 | トムソン ライセンシング | Frequency limiting amplifier for frequency conversion module |
| US8737537B2 (en) | 2006-03-29 | 2014-05-27 | Thomson Licensing | Frequency translation module frequency limiting amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6156904B2 (en) | 1986-12-04 |
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