GB1083390A - A frequency-modulated oscillator - Google Patents

A frequency-modulated oscillator

Info

Publication number
GB1083390A
GB1083390A GB50423/65A GB5042365A GB1083390A GB 1083390 A GB1083390 A GB 1083390A GB 50423/65 A GB50423/65 A GB 50423/65A GB 5042365 A GB5042365 A GB 5042365A GB 1083390 A GB1083390 A GB 1083390A
Authority
GB
United Kingdom
Prior art keywords
transistors
multivibrator
transistor
circuits
nov
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
GB50423/65A
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.)
Bunker Ramo Corp
Original Assignee
Bunker Ramo Corp
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 Bunker Ramo Corp filed Critical Bunker Ramo Corp
Publication of GB1083390A publication Critical patent/GB1083390A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation

Landscapes

  • Oscillators With Electromechanical Resonators (AREA)

Abstract

1,083,390. Pulse modulation circuits; transistor multivibrators. BUNKER-RAMO CORPORATION. Nov. 26, 1965 [Nov. 27, 1964], No. 50423/65. Headings H3T and H4L. The output of a multivibrator is caused to vary over a wide frequency range by the application of a control voltage. The device is described in relation to the numerical control of machine tools and the like. As shown, the free-running multivibrator comprises transistors Q 1 , Q 2 , additional current gain to maintain oscillation at the higher frequencies being provided by complemented emitter follower circuits Q 3 , Q 4 and Q 5 , Q 6 . Associated with capacitors 18, 20 forming part of the respective charging circuits of the multi-vibrator are transistors Q 7 , Q 8 controlled by the input voltage at 10 to vary the time constant of the charging circuits and thus the operating frequency of the multivibrator. A transistor Q 9 is connected in the emitter circuit of transistors Q 7 , Q 8 and normally is forward biased by the output of the multivibrator rectified at D 2 . If oscillations should stop or fail to start, the transistor Q 9 is back-biased, cutting off transistors Q 7 , Q 8 and allowing transistors Q 1 , Q 2 to come out of saturation so that oscillation can begin.
GB50423/65A 1964-11-27 1965-11-26 A frequency-modulated oscillator Expired GB1083390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1083390XA 1964-11-27 1964-11-27

Publications (1)

Publication Number Publication Date
GB1083390A true GB1083390A (en) 1967-09-13

Family

ID=22321633

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50423/65A Expired GB1083390A (en) 1964-11-27 1965-11-26 A frequency-modulated oscillator

Country Status (1)

Country Link
GB (1) GB1083390A (en)

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