DE528681C - Feedback circuit - Google Patents
Feedback circuitInfo
- Publication number
- DE528681C DE528681C DENDAT528681D DE528681DD DE528681C DE 528681 C DE528681 C DE 528681C DE NDAT528681 D DENDAT528681 D DE NDAT528681D DE 528681D D DE528681D D DE 528681DD DE 528681 C DE528681 C DE 528681C
- Authority
- DE
- Germany
- Prior art keywords
- feedback
- feedback circuit
- differential capacitor
- bridging
- feedback coil
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
Description
Die Erfindung betrifft eine Rückkopplungsschaltung der an sich bekannten Art, bei der die induktive Kopplung zwischen der Rückkopplungsspule und. dem zu entdämpfenden Schwingungskreis mit Hilfe eines Differentialkondensators geregelt wird. Durch diesen Differentialkondensator wird bei den bekannten Anordnungen erreicht, daß bei verkleinerter Rückkopplung gleichzeitig eine kapazitive Überbrückung der Rückkopplungsspule vorgenommen wird. Um diese kapazitive Überbrückung wirksam zu machen, muß der kapazitive Nebenschluß einige ioo om betragen. Hierdurch ergibt sich jedoch beiThe invention relates to a feedback circuit of the type known per se in which the inductive coupling between the feedback coil and. the one to be de-attenuated Oscillating circuit is regulated with the help of a differential capacitor. Through this Differential capacitor is achieved in the known arrangements that at a reduced size Feedback at the same time a capacitive bridging of the feedback coil is made. To this capacitive To make bridging effective, the capacitive shunt must be a few ioo om. However, this results in
is Empfang von Musik und Sprache eine merkliche Beeinträchtigung der hohen akustischen Frequenzen.there is a noticeable reception of music and speech Impairment of high acoustic frequencies.
Gemäß der Erfindung wird deshalb an Stelle eines reinen kapazitiven NebenschlussesAccording to the invention, instead of a purely capacitive shunt
ao für die Rückkopplungsspule eine Überbrükkung durch einen Widerstand von etwa iooo Ohm vorgesehen, der in Reihe liegt mit dem zur Überbrückung dienenden Teil des Differentialkondensators. Dieser kapazitive Teilao for the feedback coil a bridging by a resistance of about iooo Ohm provided, which is in series with the part of the differential capacitor used for bridging. That capacitive part
as der Überbrückung kann, wie die Erfahrung zeigt, auf etwa 50 cm ermäßigt werden, so daß eine Beeinträchtigung der akustischen Frequenzen nicht mehr wahrnehmbar ist.As the bridging can, as the experience shows to be reduced to about 50 cm, so that an impairment of the acoustic Frequencies is no longer perceptible.
Durch die Abbildung wird der Erfindungsgedanke veranschaulicht; b ist die auf den Empfangskreis einwirkende Rückkopplungsspule, die an die eine Belegung eines Differentialkondensators α angeschlossen ist. Bei herausgedrehter Rückkopplung wird die Rückkopplungsspule b durch die zweite Belegung des Differentialkondensators überbrückt. Erfindungsgemäß liegt diese zweite Belegung, deren maximaler Kapazitätswert etwa 50 cm beträgt, in Serie mit einem Widerstand von 1000 Ohm.The idea of the invention is illustrated by the figure; b is the feedback coil acting on the receiving circuit, which is connected to the one assignment of a differential capacitor α. When the feedback is turned out, the feedback coil b is bridged by the second assignment of the differential capacitor. According to the invention, this second assignment, the maximum capacitance value of which is approximately 50 cm, is in series with a resistance of 1000 ohms.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE528681T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE528681C true DE528681C (en) | 1931-07-03 |
Family
ID=6553770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT528681D Expired DE528681C (en) | Feedback circuit |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE528681C (en) |
-
0
- DE DENDAT528681D patent/DE528681C/en not_active Expired
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