GB633430A - Improvements in and relating to reflex circuit arrangements - Google Patents
Improvements in and relating to reflex circuit arrangementsInfo
- Publication number
- GB633430A GB633430A GB7529/47A GB752947A GB633430A GB 633430 A GB633430 A GB 633430A GB 7529/47 A GB7529/47 A GB 7529/47A GB 752947 A GB752947 A GB 752947A GB 633430 A GB633430 A GB 633430A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feedback
- load
- valve
- signal
- diode
- 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
- 230000011514 reflex Effects 0.000 title abstract 3
- 230000003321 amplification Effects 0.000 abstract 1
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
- H03G3/08—Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/46—Reflex amplifiers
- H03F3/48—Reflex amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
633,430. Valve amplifying circuits. RADIO CORPORATION PROPRIETARY, Ltd. March 19, 1947, No. 7529. Convention date, March 25, 1946. [Classes 40 (v) and 40 (vi)] A reflex circuit for amplifying a modulated signal and the modulation derived therefrom, and having negative feedback at the modulation frequency, comprises a volume control having only one movable member which simultaneously adjusts the magnitude of the reflexed signal and the negative feedback. This prevents the distortion products of the higher frequency signals interfering with the modulation frequency output at low volume settings. The Figure shows a reflex amplifier for a receiver in which the I.F. signal applied to the control grid is amplified in valve V1 and fed from the tuned anode transformer T2 to a diode detector D. Potentiometer R1 forms the diode load, and the slider feeds the detected signal to the control grid for further amplification. The resulting audio output is fed from the anode resistance R4 to a further amplifier circuit comprising a valve V2 and an output transformer T3 having a feedback winding connected in series with the diode load. Due to the series connection of this load and the detector impedance, the feedback increases as the volume is turned down. A resistance R7 connected between the upper terminal of, or a tapping on, the load (Figs. 2 and 3, not shown), increases the rate of change of feedback. The invention may also be applied to a straight receiver (Fig.. 4, not shown). Specification 615,987 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU633430X | 1946-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB633430A true GB633430A (en) | 1949-12-19 |
Family
ID=3748175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7529/47A Expired GB633430A (en) | 1946-03-25 | 1947-03-19 | Improvements in and relating to reflex circuit arrangements |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB633430A (en) |
-
1947
- 1947-03-19 GB GB7529/47A patent/GB633430A/en not_active Expired
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