GB902820A - Improvements in or relating to transistor circuit arrangements - Google Patents

Improvements in or relating to transistor circuit arrangements

Info

Publication number
GB902820A
GB902820A GB373/59A GB37359A GB902820A GB 902820 A GB902820 A GB 902820A GB 373/59 A GB373/59 A GB 373/59A GB 37359 A GB37359 A GB 37359A GB 902820 A GB902820 A GB 902820A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuit
base
collector
current
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
GB373/59A
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 GB902820A publication Critical patent/GB902820A/en
Expired legal-status Critical Current

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
    • H03B5/1203—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

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

902,820. Transistor switching and oscillator circuits; amplitude modulation systems. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 5, 1959 [Jan. 8, 1958], No. 373/59. Classes 40 (5) and 40 (6). A current is supplied from a first transistor to the emitter of a second transistor, the current flowing substantially wholly to the collector or base of the second transistor 2 depending on the relative potential of these two electrodes. The Figure shows a first transistor 1 connected to a stabilizing resistor 3 and arranged as a high impedance supply for a second transistor 2. The collector circuit of the latter transistor includes a coil 9 coupled regeneratively to a tuned circuit 5 in the base circuit of transistor 1 to cause the circuit to oscillate. If the potential of the base of transistor 2 exceeds that at the collector the current is diverted to the base circuit and provides negative feed-back to the tuned circuit through coil 7 so that the oscillation amplitude is limited. Modulation may be effected by modulating the voltage of the supply 10 or the bias voltage applied to terminals 8.
GB373/59A 1958-01-08 1959-01-05 Improvements in or relating to transistor circuit arrangements Expired GB902820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL223878 1958-01-08

Publications (1)

Publication Number Publication Date
GB902820A true GB902820A (en) 1962-08-09

Family

ID=19751087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB373/59A Expired GB902820A (en) 1958-01-08 1959-01-05 Improvements in or relating to transistor circuit arrangements

Country Status (1)

Country Link
GB (1) GB902820A (en)

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