DE1252728B - - Google Patents
Info
- Publication number
- DE1252728B DE1252728B DEH60909A DEH0060909A DE1252728B DE 1252728 B DE1252728 B DE 1252728B DE H60909 A DEH60909 A DE H60909A DE H0060909 A DEH0060909 A DE H0060909A DE 1252728 B DE1252728 B DE 1252728B
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- coil
- resonant circuit
- resistance
- voltage
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
- H03B5/1296—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the feedback circuit comprising a transformer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
AUSLEGESCHRIFTEDITORIAL
Int. Cl.:Int. Cl .:
H03bH03b
H 041H 041
Deutsche Kl.: 21 al'- 9/Ö2 German class: 21 al'- 9 / Ö2
- ^ i f- ^ i f
Nummer: 1 252 728Number: 1 252 728
Aktenzeichen: H 60909 VIII a/21 alFile number: H 60909 VIII a / 21 al
Anmeldetag: 2. November 1966Filing date: November 2, 1966
Auslegetag: 26. Oktober 1967Opening day: October 26, 1967
Die Erfindung betrifft einen Transistor-Oszillator mit induktiver Rückkopplung und einem Schwingkreis als frequenzbestimmendem Glied.The invention relates to a transistor oscillator with inductive feedback and an oscillating circuit as a frequency-determining element.
Bei den bekannten Oszillatoren der genannten Art arbeitet der Transistor im sogenannten /4-Betrieb, d. h., der Arbeitspunkt liegt in der Mitte des linearen Teils der Aussteuerungskennlinie. Bei diesen Oszillatoren sind gewisse Schwankungen der Frequenz, Phasenlage und Ausgangsspannung unvermeidlich, da die dynamischen Daten des Transistors sich temperaturabhängig ändern.In the known oscillators of the type mentioned, the transistor works in the so-called / 4 mode, d. In other words, the operating point lies in the middle of the linear part of the modulation characteristic. With these oscillators certain fluctuations in frequency, phase position and output voltage are inevitable because the dynamic data of the transistor change depending on the temperature.
Es bestand nun die Aufgabe, einen Oszillator zu schaffen, der einen Modulationston, und zwar einen Sinuston, für einen aus derselben Gleichspannungsquelle gespeisten HF-Sender liefert, wobei der Modulationsgrad weitgehend konstant bleiben soll. Dieser Oszillator muß daher so beschaffen sein, daß seine Ausgangsspannung von Temperaturschwankungen am Transistor unabhängig, dagegen — wie die Amplitude der Trägerwelle des HF-Senders — von der Speisespannung proportional abhängig ist.The task now was to create an oscillator that would produce a modulation tone, namely one Sinus tone, for an HF transmitter fed by the same DC voltage source, where the degree of modulation should remain largely constant. This oscillator must therefore be designed so that its Output voltage independent of temperature fluctuations at the transistor, on the other hand - like that Amplitude of the carrier wave of the HF transmitter - is proportionally dependent on the supply voltage.
Diese Bedingung wird erfindungsgemäß dadurch erfüllt, daß der Transistor in an sich bekannter Weise als Schalttransistor arbeitet, daß ferner in die Kollektorzuleitung, also in Reihe mit der als Arbeitswiderstand dienenden Spule (Schwingkreis- bzw. Rückkopplungsspule) ein ohmscher Widerstand eingeschaltet ist, der — vorzugsweise um ein Mehrfaches — größer ist als der Kennwiderstand des Schwingkreises, und daß als Ausgangsspannung die an der Spule auftretende Wechselspannung dient.According to the invention, this condition is met by the transistor in a manner known per se as a switching transistor that also works in the collector lead, so in series with the working resistor Serving coil (resonant circuit or feedback coil) an ohmic resistor is switched on is, which - preferably several times - is greater than the characteristic resistance of the Resonant circuit, and that the alternating voltage occurring at the coil is used as the output voltage.
Beim Betrieb eines Transistors als Schalttransistor gehen bekanntlich seine dynamischen Daten nicht in die Ausgangsspannung ein, und der erfindungsgemäß eingeschaltete Widerstand entkoppelt den Schwingkreis von dem Transistor, so daß trotz des Betriebes des Transistors als Schalttransistor die Sinusform der Schwingkreisspannung weitgehend erhalten bleibt.When operating a transistor as a switching transistor, as is well known, its dynamic data are not included the output voltage, and the resistor switched on according to the invention decouples the resonant circuit of the transistor, so that despite the operation of the transistor as a switching transistor, the sinusoidal shape of the Resonant circuit voltage is largely retained.
An Hand der Zeichnungen wird die Erfindung näher erläutert.The invention is explained in more detail with reference to the drawings.
Abb. 1 zeigt ein Schaltungsbeispiel des erfindungsgemäßen Oszillators undFig. 1 shows a circuit example of the oscillator according to the invention and
A b b. 2 ein Schaubild seiner Spannungskurven.A b b. 2 a graph of its voltage curves.
In der A b b. 1 ist 1 der Transistor. 2 ist die Spule und 3 der Kondensator des frequenzbestimmenden
Schwingkreises, während der Widerstand 4 den resultierenden Verlustwiderstand darstellt. Die Widerstände
5 und 6 bilden zusammen den Basisspannungsteiler, und in die Basiszuleitung ist die Rückkopplungsspule
7 eingeschaltet. In die Kollektorzuleitung ist, in Reihe mit der Schwingkreisspule 2, ein
Widerstand 8 geschaltet, der gemäß dem Erfindungs-Transistor-Oszillator mit induktiver
RückkopplungIn the A b b. 1 is 1 the transistor. 2 is the coil and 3 is the capacitor of the frequency-determining resonant circuit, while the resistor 4 represents the resulting loss resistance. The resistors 5 and 6 together form the base voltage divider, and the feedback coil 7 is connected to the base lead. In the collector lead, a resistor 8 is connected in series with the resonant circuit coil 2, which according to the invention transistor oscillator with inductive
Feedback
Anmelder:Applicant:
HAGENUK vormals Neufeldt & Kuhnke
G. m. b. H.,
Kiel, Westring 431-451HAGENUK formerly Neufeldt & Kuhnke
GmbH.,
Kiel, Westring 431-451
Als Erfinder benannt:Named as inventor:
Peter Buttenschön, Schierensee über KielPeter Buttenschön, Schierensee via Kiel
Vorschlag größer ist als der Kennwiderstand des Schwingkreises 2, 3. Bei einem Oszillator, dessen Schwingkreis an der Basis des Transistors und dessen Rückkopplungsspule in der Kollektorleitung liegt, würde sinngemäß der Widerstand 8 mit der Rückkopplungsspule in Reihe geschaltet sein; Voraussetzung hierbei ist, daß die Kopplung der Spulen hinreichend stark bemessen ist. Bei der Bemessung des Widerstandes 8 ist in diesem Fall der in die Rückkopplungsspule hineintransformierte Kennwiderstand des Schwingkreises zugrunde zu legen.Proposal is greater than the characteristic resistance of the resonant circuit 2, 3. In an oscillator whose resonant circuit is at the base of the transistor and whose feedback coil is in the collector line, the resistor 8 would be connected in series with the feedback coil; The prerequisite here is that the coupling of the coils is sufficiently strong. When dimensioning the resistor 8 , the characteristic resistance of the resonant circuit transformed into the feedback coil must be used as a basis in this case.
An die Klemmen Plus und Minus ist die Speisegleichspannung angeschlossen zu denken. Die Ausgangswechselspannung wird an der Klemme B, bezogen auf Masse, abgenommen, was wegen der üblichen wechselstrommäßigen Überbrückung der Speisespannungsquelle einer Abnahme am Schwingkreis gleichkommt.The DC supply voltage should be thought of as connected to the plus and minus terminals. The output alternating voltage is taken from the terminal B with reference to ground, which is equivalent to a decrease in the resonant circuit due to the usual alternating current bridging of the supply voltage source.
Die Kurve der an der Klemme B abgenommenen Spannung Ub ist, wie aus der A b b. 2 (stark ausgezogene Kurve) hervorgeht, sinusförmig. Am Punkt ,4 der Schaltung tritt eine Spannung Ua auf, deren Verlauf die gestrichelt gezeichnete Kurve angibt.The curve of the voltage U b taken from the terminal B is as shown in A b b. 2 (solid curve) is sinusoidal. At point 4 of the circuit, a voltage U a occurs, the course of which is indicated by the curve shown in dashed lines.
Die untere Grenze für die Bemessung des Widerstandes 8 ist nicht allein durch die bereits erwähnte Bedingung gesetzt, daß dieser größer sein soll als der Kennwiderstand des Schwingkreises 2, 3 (damit nämlich die untere — positive — Halbwelle von Ub nie positiver wird als der Tiefstwert von UA), sondern auch noch durch die Größe des jeweils zugelassenen Klirrfaktors. Je größer der Widerstand 8 gewählt wird, um so kleiner ist der sich ergebende Klirrfaktor; wegen der Spannungsteilung zwischen dem Widerstände einerseits und dem Spulenwiderstand sowie dem zu der Spule 2 parallelliegenden Lastwiderstand andererseits wird allerdings auch die Aus-The lower limit for the dimensioning of the resistance 8 is not set solely by the condition already mentioned that it should be greater than the characteristic resistance of the resonant circuit 2, 3 (so that the lower - positive - half-wave of U b is never more positive than the lowest value from U A ), but also by the size of the distortion factor permitted in each case. The larger the resistor 8 is selected, the smaller the resulting distortion factor; Due to the voltage division between the resistors on the one hand and the coil resistance and the load resistance parallel to the coil 2 on the other hand, the output
709 679/396709 679/396
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH60909A DE1252728B (en) | 1966-11-02 | 1966-11-02 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH60909A DE1252728B (en) | 1966-11-02 | 1966-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1252728B true DE1252728B (en) | 1967-10-26 |
Family
ID=605588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEH60909A Pending DE1252728B (en) | 1966-11-02 | 1966-11-02 |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1252728B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931549A (en) * | 1974-10-24 | 1976-01-06 | General Signal Corporation | Control circuit for electromagnetic transducer |
-
1966
- 1966-11-02 DE DEH60909A patent/DE1252728B/de active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931549A (en) * | 1974-10-24 | 1976-01-06 | General Signal Corporation | Control circuit for electromagnetic transducer |
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