GB739107A - Improvements in or relating to transistor mixing circuit arrangements - Google Patents

Improvements in or relating to transistor mixing circuit arrangements

Info

Publication number
GB739107A
GB739107A GB17222/53A GB1722253A GB739107A GB 739107 A GB739107 A GB 739107A GB 17222/53 A GB17222/53 A GB 17222/53A GB 1722253 A GB1722253 A GB 1722253A GB 739107 A GB739107 A GB 739107A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
tuned
collector
signal
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
GB17222/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB739107A publication Critical patent/GB739107A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • 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
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)

Abstract

739,107. Modulating and frequency changing apparatus; transistor generating circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 22, 1953 [June 25, 1952], No. 17222/53. Classes 40 (5) and 40 (6). A modulator or frequency-changhing circuit comprises a transistor associated with a resonant circuit so as to be self-oscillatory at a frequency fo, the input signal of frequency fi being applied between the emitter and base electrodes and output signal being developed between the collector and base electrodes, this second resonant circuit being tuned to twice the frequency of the locally generated oscillation, i.e. to 2fo, or to a frequency (2foŒfi) differing therefrom by the frequency of the input signal. In the arrangement shown, the circuit oscillates at the frequency fo due to the tuned circuit 2 connected in the base circuit of the transistor 1. The supply arrangements for the circuit are such that the oscillations are limited as shown in Fig. 3, curve i 1 , wherein is shown the variation of collector current with time for a zero value of input signal from the generator 3. Upon a change in the instantaneous value of the signal from the generator 3, an output such as shown by curve i 2 is obtained; it will thus be seen that the signal of frequency fi results in the production of pulses of current #i in the collector circuit at a frequency 2fo and modulated in amplitude by the signal of frequency fi. If the circuit is to be used as a frequency changer the filter 4 in the collector circuit is tuned to either frequency (2fo+fi) or frequency (2fo - fi); if it is to be used as a modulator the filter is tuned to the frequency 2fo. Since the filter 4 is tuned to a frequency considerably different from that of the oscillation generated by the circuit, regenerative effects due to the impedance of the circuit 4 at the frequency of the oscillation are avoided. In a modification the tuned circuit 2 is replaced by a resistor 8, and a series tuned circuit 7 is connected between the emitter and collector electrodes.
GB17222/53A 1952-06-25 1953-06-22 Improvements in or relating to transistor mixing circuit arrangements Expired GB739107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL170604 1952-06-25

Publications (1)

Publication Number Publication Date
GB739107A true GB739107A (en) 1955-10-26

Family

ID=19750570

Family Applications (2)

Application Number Title Priority Date Filing Date
GB17221/53A Expired GB763443A (en) 1952-06-25 1953-06-22 Improvements in or relating to transistor circuits for amplifying electrical signals
GB17222/53A Expired GB739107A (en) 1952-06-25 1953-06-22 Improvements in or relating to transistor mixing circuit arrangements

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB17221/53A Expired GB763443A (en) 1952-06-25 1953-06-22 Improvements in or relating to transistor circuits for amplifying electrical signals

Country Status (6)

Country Link
BE (2) BE520933A (en)
CH (2) CH318086A (en)
DE (2) DE921995C (en)
FR (2) FR1086824A (en)
GB (2) GB763443A (en)
NL (1) NL92530C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009239B (en) * 1954-01-29 1957-05-29 Philips Nv Cascade amplifier circuit with transistors
DE1063646B (en) * 1955-05-18 1959-08-20 Philips Nv Arrangement for amplifying a signal voltage using a transistor relaxation oscillator
US2924744A (en) * 1955-09-08 1960-02-09 Gen Electric Deflection circuit
DE1090729B (en) * 1959-07-04 1960-10-13 Deutsche Elektronik Gmbh Mixer stage with one transistor
US3248557A (en) * 1959-07-20 1966-04-26 Bendix Corp Transistor parametric reactance amplifier
NL253953A (en) * 1959-07-20
DE1150412B (en) * 1960-09-09 1963-06-20 Henry P Kalmus Circuit arrangement for amplifying or measuring a direct current quantity
US3177437A (en) * 1961-07-10 1965-04-06 Gen Electric Vertical deflection circuit

Also Published As

Publication number Publication date
BE520932A (en)
BE520933A (en)
CH318086A (en) 1956-12-15
FR1086824A (en) 1955-02-16
FR1089523A (en) 1955-03-18
CH317318A (en) 1956-11-15
NL92530C (en)
DE921995C (en) 1955-01-07
GB763443A (en) 1956-12-12
DE933517C (en) 1955-09-29

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