GB1023613A - Demodulator and control-voltage generator of high sensitivity - Google Patents
Demodulator and control-voltage generator of high sensitivityInfo
- Publication number
- GB1023613A GB1023613A GB523963A GB523963A GB1023613A GB 1023613 A GB1023613 A GB 1023613A GB 523963 A GB523963 A GB 523963A GB 523963 A GB523963 A GB 523963A GB 1023613 A GB1023613 A GB 1023613A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- resistor
- transistor
- voltage
- bias
- 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.)
- Expired
Links
- 230000035945 sensitivity Effects 0.000 title 1
- 230000007423 decrease Effects 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/08—Demodulation of amplitude-modulated oscillations by means of non-linear two-pole elements
- H03D1/10—Demodulation of amplitude-modulated oscillations by means of non-linear two-pole elements of diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
- H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
- H03D1/18—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of semiconductor devices
-
- 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
-
- 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
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuits Of Receivers In General (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
1,023,613. Receiver detector and gain control circuits. STANDARD TELEPHONES & CABLES Ltd. Feb. 8, 1963 [Feb. 10, 1962], No. 5239/63. Headings H3Q and H3T. A radio receiver has its detector output coupled for A.C. and D.C. to a succeeding transistor amplifier which amplifies the A.C. and provides an A.G.C. voltage therefrom, the amplifier also providing a potential which stabilizes its own bias. The detector diode 4 is forward biased by a voltage from potentiometer 9, 10 and as the signal level increases the change in transistor and detector bias is reduced by the decrease in voltage across resistor 10 due to the increasing voltage across resistor 8. For large signals however the bias applied to the detector from resistor 10 decreases and may reverse, so enabling the detector to handle these larger signals and reducing the signal input to the transistor. The operation of the transistor may be stabilized by making resistor 10 temperature dependent and an A.G.C. signal may be derived from a potentiometer 13, the setting of which determines the delay.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST18841A DE1175293B (en) | 1962-02-10 | 1962-02-10 | Circuit arrangement of high sensitivity for AM receivers for demodulation and control voltage generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1023613A true GB1023613A (en) | 1966-03-23 |
Family
ID=7457997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB523963A Expired GB1023613A (en) | 1962-02-10 | 1963-02-08 | Demodulator and control-voltage generator of high sensitivity |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1175293B (en) |
| GB (1) | GB1023613A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117459005A (en) * | 2023-11-08 | 2024-01-26 | 成都航空职业技术学院 | Self-adaptive negative feedforward control circuit based on high-power signal linearity |
-
1962
- 1962-02-10 DE DEST18841A patent/DE1175293B/en active Pending
-
1963
- 1963-02-08 GB GB523963A patent/GB1023613A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1175293B (en) | 1964-08-06 |
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