GB680568A - A tone control arrangement for a low frequency signal amplifier - Google Patents
A tone control arrangement for a low frequency signal amplifierInfo
- Publication number
- GB680568A GB680568A GB395550A GB395550A GB680568A GB 680568 A GB680568 A GB 680568A GB 395550 A GB395550 A GB 395550A GB 395550 A GB395550 A GB 395550A GB 680568 A GB680568 A GB 680568A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative feedback
- potentiometer
- valve
- higher frequencies
- amplifier
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/04—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes
- H03G9/06—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for gain control and tone control
- H03G9/08—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having discharge tubes for gain control and tone control incorporating negative feedback
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
680,568. Valve amplifying circuits. COLE, Ltd., E. K., and BURNARD, C. L. Feb. 15, 1951 [Feb. 16, 1950], No. 3955/50. Class 40 (vi). A tone control circuit for a low-frequency amplifier using negative-feedback is such that when the volume control is adjusted to give maximum input to the amplifier the negative feedback causes relatively greater signal suppression of the higher frequencies than of the lower frequencies. The Figure shows a valve A comprising the diode detector and L.F. amplifier stages of a radio receiver, the R.F. signal input being applied across the tuned circuit 1 to produce a rectified voltage across the potentiometer 2. The anode of the valve is connected through a negative feedback path comprising capacitor 5 to the high potential end of potentiometer 2 and the capacitor 5 is of such a value that its impedance is lowest for the higher frequencies so that when the volume is at a maximum so also is the negative feedback and the higher frequencies including interference noises are substantially reduced. As the tapping point of the potentiometer 2 is moved towards the low potential end the effect of negative feedback is progressively reduced. Specification 494,024 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB395550A GB680568A (en) | 1950-02-16 | 1950-02-16 | A tone control arrangement for a low frequency signal amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB395550A GB680568A (en) | 1950-02-16 | 1950-02-16 | A tone control arrangement for a low frequency signal amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB680568A true GB680568A (en) | 1952-10-08 |
Family
ID=9768039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB395550A Expired GB680568A (en) | 1950-02-16 | 1950-02-16 | A tone control arrangement for a low frequency signal amplifier |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB680568A (en) |
-
1950
- 1950-02-16 GB GB395550A patent/GB680568A/en not_active Expired
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