GB818860A - Improvements in or relating to oscillators - Google Patents

Improvements in or relating to oscillators

Info

Publication number
GB818860A
GB818860A GB1018/58A GB101858A GB818860A GB 818860 A GB818860 A GB 818860A GB 1018/58 A GB1018/58 A GB 1018/58A GB 101858 A GB101858 A GB 101858A GB 818860 A GB818860 A GB 818860A
Authority
GB
United Kingdom
Prior art keywords
resistor
valve
resistance
temperature coefficient
cathode
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
GB1018/58A
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 GB818860A publication Critical patent/GB818860A/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
    • H03B5/10—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 vacuum tube

Landscapes

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

Abstract

818,860. Valve oscillator circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 10, 1958 [Jan. 14, 1957], No. 1018/58. Class 40 (6.). An oscillator comprises a valve, a frequency determining tuned circuit and a resistive element having a high temperature coefficient of resistance for limiting the amplitude of the generated oscillations. The oscillator is characterized in that the cathode of the valve is connected through a resistor to a point of constant potential and the oscillatory circuit is connected between this point and the control grid of the valve. A potential divider consisting of the resistor having a high temperature coefficient of resistance and another resistor, is connected across the cathode load and the common point of these two resistors is connected to a tapping on the oscillatory circuit to provide the feedback path. In the embodiment shown the tuned circuit formed by the inductance L and the capacitors C 1 and C 2 is connected between the grid of valve B and earth and the potential divider is formed by a resistor R 1 and a resistor with a high negative temperature coefficient of resistance R ntc . This potential divider is connected across the cathode resistor R k via a blocking capacitor C 3 and the feedback path is completed by joining the junction of R 1 and R ntc to the junction of C 1 and C 2 .
GB1018/58A 1957-01-14 1958-01-10 Improvements in or relating to oscillators Expired GB818860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL818860X 1957-01-14

Publications (1)

Publication Number Publication Date
GB818860A true GB818860A (en) 1959-08-26

Family

ID=19838984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1018/58A Expired GB818860A (en) 1957-01-14 1958-01-10 Improvements in or relating to oscillators

Country Status (1)

Country Link
GB (1) GB818860A (en)

Similar Documents

Publication Publication Date Title
US3054966A (en) Crystal controlled oscillator with temperature compensating means
US2764687A (en) Transistor automatic frequency control
US3435375A (en) Controller having fet bridge circuit
GB2141299A (en) Variable frequency oscillator
GB1121439A (en) Electronic tunable oscillator circuit
US3416100A (en) Voltage tuned oscillator with resistive and capacitive tuning diodes
US2930002A (en) Oscillator
US3152309A (en) Simulated high-q inductor
US3239776A (en) Amplitude regulated oscillator circuit
GB753953A (en) Improvements in or relating to stabilized transistor oscillators
US2885575A (en) Limiting circuit
US2988709A (en) Transistorized blocking oscillator for telemetering circuits
GB818860A (en) Improvements in or relating to oscillators
US3444738A (en) Self-oscillating impedance measuring loop
US3030566A (en) Transistor frequency multiplier
GB1093538A (en) Improvements in or relating to switched frequency oscillators
US2878386A (en) Stable transistor oscillator
US3382447A (en) Ultrastable crystal-controlled transistor oscillator-multiplier
SE325933B (en)
US3025476A (en) Crystal controlled high frequency transistor oscillator
GB1120592A (en) Improvements in or relating to tuned circuits employing transistors
US2843746A (en) Amplitude control for oscillators
US3199050A (en) Transistor oscillator having voltage dependent resistor for frequency stabilization
GB1187377A (en) Improvements in or relating to Proximity Detectors
US3535656A (en) Voltage controlled solid state circuit