GB505352A - Improvements in or relating to frequency dividers - Google Patents

Improvements in or relating to frequency dividers

Info

Publication number
GB505352A
GB505352A GB37526/38A GB3752638A GB505352A GB 505352 A GB505352 A GB 505352A GB 37526/38 A GB37526/38 A GB 37526/38A GB 3752638 A GB3752638 A GB 3752638A GB 505352 A GB505352 A GB 505352A
Authority
GB
United Kingdom
Prior art keywords
oscillators
frequency
indicated
impedance
circuits
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
GB37526/38A
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 AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB505352A publication Critical patent/GB505352A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/16—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using a transformer for feedback, e.g. blocking oscillator with saturable core
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/00006—Changing the frequency

Abstract

505,352. Valve generating circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Dec. 23, 1938, No. 37526. Convention date, Dec. 23, 1937. [Class 40 (v)] Two blocking oscillators, or multi-vibrators, which are arranged to operate at different sub-multiples of a control frequency are interconnected so that impulses at a frequency equal to the greatest common sub-multiple are produced across a common output' impedance. The essential parts of the circuits of two blocking oscillators are indicated in Fig. 6. As shown, the two valves are pentodes, although a single valve with electrodes as indicated in Fig. 9, could be used, the screens of the valves being used as the oscillator anodes and the control,and suppressor grids being cross connected. The oscillators are arranged to oscillate at different sub-multiples of the main frequency. With this arrangement an impulse is produced across the common anode impedance 10, Fig. 6, only when the two oscillators are in step. For example, if the synchronizing frequency is S and the two circuits oscillate at S/n and S/m respectively, the frequency of the pulses across 10 is S/n Î m . The conducting periods of the oscillators is kept short to prevent intermediate pulses due to overlap. Synchronizing pulses may be applied across an impedance 6 in the grid lead as indicated in Fig. 3, or across 6<1> in the cathode lead as shown in Fig. 4.
GB37526/38A 1937-12-24 1938-12-23 Improvements in or relating to frequency dividers Expired GB505352A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET49715D DE711591C (en) 1937-12-24 1937-12-24 Circuit arrangement for frequency division with electron tubes that are connected as blocking oscillators or belong to multivibrators

Publications (1)

Publication Number Publication Date
GB505352A true GB505352A (en) 1939-05-09

Family

ID=6546355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37526/38A Expired GB505352A (en) 1937-12-24 1938-12-23 Improvements in or relating to frequency dividers

Country Status (4)

Country Link
US (1) US2237668A (en)
DE (1) DE711591C (en)
FR (1) FR847895A (en)
GB (1) GB505352A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758534C (en) * 1939-06-03 1954-11-22 Opta Radio A G Arrangement for frequency division of a pulse voltage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516533A (en) * 1945-04-07 1950-07-25 Frederick F Slack Electrical circuit
US2485395A (en) * 1945-04-11 1949-10-18 Gen Electric Pulse generating circuit
US2708241A (en) * 1946-01-30 1955-05-10 Bess Leon Wide gate generator
NL83200C (en) * 1947-10-03 1900-01-01
US2695959A (en) * 1948-09-09 1954-11-30 Bell Telephone Labor Inc Frequency dividing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758534C (en) * 1939-06-03 1954-11-22 Opta Radio A G Arrangement for frequency division of a pulse voltage

Also Published As

Publication number Publication date
FR847895A (en) 1939-10-18
US2237668A (en) 1941-04-08
DE711591C (en) 1941-10-03

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