US2138138A - Transmitter circuit - Google Patents

Transmitter circuit Download PDF

Info

Publication number
US2138138A
US2138138A US112038A US11203836A US2138138A US 2138138 A US2138138 A US 2138138A US 112038 A US112038 A US 112038A US 11203836 A US11203836 A US 11203836A US 2138138 A US2138138 A US 2138138A
Authority
US
United States
Prior art keywords
amplitude
frequency
transmitter
oscillator
anode
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 - Lifetime
Application number
US112038A
Other languages
English (en)
Inventor
Bruckner Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US2138138A publication Critical patent/US2138138A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power

Definitions

  • a constant amplitude can be attained, for example, by detecting the produced high-frequency in a special tube, and the D. C. component of the detected oscillation produces a voltage drop through a high-ohmic resistor, which voltage drop exerts a regulating influence upon the grid of the transmitter tube.
  • the high-frequency amplitude increases, a negative potential is produced at the resistor which moves the working point of the transmitter tube into the negative region thereby decreasing the amplitude.
  • this danger is overcome in that besides the said regulation, an additional load resistor which depends upon the amplitude is employed in parallel to the transmitter tube, and which increases when the amplitude decreases, removing thereby load from the transmitter circuit thus sustaining the oscillation.
  • the single figure of the drawing shows, by way of example only, a transmitter circuit having a vacuum tube arranged for self excitation at substantially constant amplitude, constructed in accordance with the principles of the present invention.
  • This circuit includes an ordinary self excited oscillator transmitter tube V1 across whose output electrodes are arranged a pair of electron discharge devices V2 and G.
  • the high frequency in the plate circuit is passed across the condenser C into the control tube V2 connected as anode rectifier, whereby it will be rectified and produces a voltage drop through the resistor R serving as grid bias for the transmitter tube.
  • an additional load branch is placed in parallel to the plate circuit of the transmitter tube, and which consists of a detector G and a voltage source B in series (or also in parallel) thereto, and a choke Dr closing the D. C. path.
  • the detector bias B is so chosen that the positive peaks of the high-frequency produced by the transmitter tube, exceed normally the detector bias B. Then a small current flows and which represents a load for the transmitter tube.
  • the high-frequency amplitude decreases, the current in the detector decreases, and thereby the load decreases comparatively much more, since the load does not depend upon the entire high-frequency amplitude, but only upon the peaks exceeding the bias, and which make up only a fraction of the entire high-frequency amplitude.
  • the load becomes a zero when the positive peaks of the high-frequency have dropped to the value of the bias B.
  • the present invention can be applied especially to control stages of remote controlled transmitters or of frequency multipliers in which a high degree of amplitude and frequency constancy is required.
  • an electron discharge device oscillator having an anode, a cathode and a grid, a series circuit of a coil and a condenser between said grid and cathode, an oscillatory circuit including a coil coupled to said first coil connected between said anode and cathode, and a series circuit of condenser, an electron discharge device detector and a source of bias potential in the order named connected between 0 said anode and cathode, whereby only positive peaks of potential generated by said oscillator which exceed the bias of said source causes current to flow in said detector.
  • a system in accordance with claim 1 including an electron discharge device rectifier connected in shunt to said oscillator, said last device having a grid capacitively coupled to the anode of said oscillator, an anode resistively coupled to the junction of said first condenser and first coil, and a cathode coupled through a source of potential to the cathode of said oscillator.
  • a high frequency system for obtaining 0scillations of substantially constant frequency and amplitude comprising an electron discharge device oscillator having input and output electrodes coupled together for self oscillation, a load in the form of a detector across said output electrodes for decreasing the amplitude thereof when said amplitude exceeds a mean value, and a multielectrode rectifier in parallel relation to said detector, said rectifier having grid and anode electrodes, said grid being coupled to the output electrode of said oscillator, and said anode being conductively coupled from a direct current standpoint to the input electrode of said oscillator to control the bias thereof, whereby the amplitude of oscillations is increased when said amplitude falls below said mean value.

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)
US112038A 1935-11-20 1936-11-21 Transmitter circuit Expired - Lifetime US2138138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET46036D DE645686C (de) 1935-11-20 1935-11-20 Anordnung zur Konstanthaltung von Amplitude und Frequenz bei selbsterregten Sendern

Publications (1)

Publication Number Publication Date
US2138138A true US2138138A (en) 1938-11-29

Family

ID=27770832

Family Applications (1)

Application Number Title Priority Date Filing Date
US112038A Expired - Lifetime US2138138A (en) 1935-11-20 1936-11-21 Transmitter circuit

Country Status (4)

Country Link
US (1) US2138138A (de)
AT (1) AT150777B (de)
DE (1) DE645686C (de)
NL (1) NL47282C (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438904A (en) * 1942-11-23 1948-04-06 Standard Telephones Cables Ltd Timing system
US2442138A (en) * 1944-08-05 1948-05-25 Du Mont Allen B Lab Inc Stabilized modulated oscillator
US2469264A (en) * 1944-11-29 1949-05-03 Rca Corp Generation and modulation of alternating current signals
US2475063A (en) * 1944-02-24 1949-07-05 Rca Corp Regulated high-voltage apparatus
US2661425A (en) * 1949-05-14 1953-12-01 Mittelmann Electronics Corp Impedance matching generator
US2760188A (en) * 1950-03-03 1956-08-21 Radio Patents Company Proximity control device
US2959745A (en) * 1957-03-06 1960-11-08 Donald D Grieg Control means for transistor oscillators

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438904A (en) * 1942-11-23 1948-04-06 Standard Telephones Cables Ltd Timing system
US2475063A (en) * 1944-02-24 1949-07-05 Rca Corp Regulated high-voltage apparatus
US2442138A (en) * 1944-08-05 1948-05-25 Du Mont Allen B Lab Inc Stabilized modulated oscillator
US2469264A (en) * 1944-11-29 1949-05-03 Rca Corp Generation and modulation of alternating current signals
US2661425A (en) * 1949-05-14 1953-12-01 Mittelmann Electronics Corp Impedance matching generator
US2760188A (en) * 1950-03-03 1956-08-21 Radio Patents Company Proximity control device
US2959745A (en) * 1957-03-06 1960-11-08 Donald D Grieg Control means for transistor oscillators

Also Published As

Publication number Publication date
AT150777B (de) 1937-09-25
DE645686C (de) 1938-12-13
NL47282C (de)

Similar Documents

Publication Publication Date Title
US2138138A (en) Transmitter circuit
US2346545A (en) Electron discharge device circuit
US2233778A (en) Automatic frequency control circuit
US2623954A (en) Electron discharge tube amplifier for signal voltages
US2230483A (en) Stabilization for vacuum tube amplifiers
US2315658A (en) Negative resistance device
US2311807A (en) Electron discharge device circuit
US2033986A (en) Frequency converter
US2129085A (en) Automatic frequency control circuit
US2312139A (en) Stabilized regenerative circuits
US2140339A (en) Frequency control circuits
US2398214A (en) Superregenerative receiver
US2135942A (en) Automatic gain control circuit
US2058738A (en) Electrical circuit for cold cathode tubes
US2509280A (en) Cathode-driven oscillator
US2192306A (en) Ultra short wave tube circuit
US2505024A (en) Wave translating circuits
US1971347A (en) Signaling system
US2229674A (en) Rectifying and amplifying circuits
US2073454A (en) Pentode heterodyne detector
US2355433A (en) Wave length modulation circuit
US2030872A (en) Ultra-short wave receiver
US2048758A (en) Power output tube bias arrangement
US2535401A (en) Superregenerative receiver
US2118287A (en) Automatic gain control circuit