GB1093538A - Improvements in or relating to switched frequency oscillators - Google Patents

Improvements in or relating to switched frequency oscillators

Info

Publication number
GB1093538A
GB1093538A GB44407/64A GB4440764A GB1093538A GB 1093538 A GB1093538 A GB 1093538A GB 44407/64 A GB44407/64 A GB 44407/64A GB 4440764 A GB4440764 A GB 4440764A GB 1093538 A GB1093538 A GB 1093538A
Authority
GB
United Kingdom
Prior art keywords
voltage
oscillator
circuit
capacitor
transistor
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
Application number
GB44407/64A
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 Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1093538A publication Critical patent/GB1093538A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/12—Modulator circuits; Transmitter circuits
    • 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
    • H03B5/1231—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
    • H03B5/1237—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 comprising means for varying the frequency of the generator
    • H03B5/124—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 comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • H03B5/1243—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 comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
    • 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
    • H03B5/1237—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 comprising means for varying the frequency of the generator
    • H03B5/1293—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 comprising means for varying the frequency of the generator having means for achieving a desired tuning characteristic, e.g. linearising the frequency characteristic across the tuning voltage range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/02—Varying the frequency of the oscillations by electronic means
    • H03B2201/025—Varying the frequency of the oscillations by electronic means the means being an electronic switch for switching in or out oscillator elements

Abstract

1,093,538. Frequency shift oscillator. TELEFUNKEN PATENTVERWERTUNGS. G.m.b.H. Oct. 30, 1964 [Oct. 31, 1963], No. 44407/64. Heading H3R. A frequency shift oscillator comprises an oscillator 1 with frequency determining circuit 2 across which a capacitor 3 can be connected via by-pass capacitor 6 and the emitter-collector path of a transistor 4 which is switched into conduction by a keying voltage applied between terminals 11 and 12. Transistor 4 is connected as a reactance stage, capacitor 5 and resistor 9 developing a base voltage and hence an emitter-collector current which is 90 degrees out of phase with the voltage across the frequency determining circuit 2. This current, flowing through capacitor 3 develops a voltage in phase with the voltage across circuit 2 and the transistor circuit is dimensioned such that these voltages become equal, i.e. capacitor 3 is effectively connected across the circuit 2, when the D.C. voltage drop between emitter and collector is substantially zero. The accuracy of the two frequencies is not affected by transistor ageing or by variation in keying voltage above the value necessary to produce the above condition and the oscillator frequency varies linearly with keying voltage between the two values. In a second arrangement, Fig. 3 (not shown), a further similar transistor circuit is connected across the frequency determining circuit of the oscillator whereby the oscillator can be switched to operate at any one of four set frequencies.
GB44407/64A 1963-10-31 1964-10-30 Improvements in or relating to switched frequency oscillators Expired GB1093538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET24987A DE1211292B (en) 1963-10-31 1963-10-31 Oscillator switchable between two or more frequency values

Publications (1)

Publication Number Publication Date
GB1093538A true GB1093538A (en) 1967-12-06

Family

ID=7551788

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44407/64A Expired GB1093538A (en) 1963-10-31 1964-10-30 Improvements in or relating to switched frequency oscillators

Country Status (2)

Country Link
DE (1) DE1211292B (en)
GB (1) GB1093538A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535430A (en) * 1967-01-23 1970-10-20 Motorola Inc Transistor frequency glide control for musical twin-t oscillator tone generators
US3618132A (en) * 1969-05-23 1971-11-02 Rca Corp Frequency shift oscillator which avoids the generation of transients
US4748634A (en) * 1987-03-20 1988-05-31 Hughes Aircraft Company Pumping system for RF excited gas devices
GB2335098A (en) * 1997-12-17 1999-09-08 Ove Kris Gashus Apparatus and method for frequency shift keying
US6181719B1 (en) 1998-11-24 2001-01-30 Universal Laser Systems, Inc. Gas laser RF power source apparatus and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1289887B (en) * 1966-09-29 1969-02-27 Siemens Ag Oscillator switching with a transistor with an electromechanical oscillator that stabilizes the frequency of the high-frequency electrical oscillations to be generated in the oscillator circuit and with an electrical resistor that stabilizes the DC operating point

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535430A (en) * 1967-01-23 1970-10-20 Motorola Inc Transistor frequency glide control for musical twin-t oscillator tone generators
US3618132A (en) * 1969-05-23 1971-11-02 Rca Corp Frequency shift oscillator which avoids the generation of transients
US4748634A (en) * 1987-03-20 1988-05-31 Hughes Aircraft Company Pumping system for RF excited gas devices
GB2335098A (en) * 1997-12-17 1999-09-08 Ove Kris Gashus Apparatus and method for frequency shift keying
US6185264B1 (en) * 1997-12-17 2001-02-06 Ove Kris Gashus Apparatus and method for frequency shift keying
GB2335098B (en) * 1997-12-17 2001-07-25 Ove Kris Gashus Apparatus and method for frequency shift keying
US6181719B1 (en) 1998-11-24 2001-01-30 Universal Laser Systems, Inc. Gas laser RF power source apparatus and method

Also Published As

Publication number Publication date
DE1211292B (en) 1966-02-24

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