GB555523A - Bridge-stabilised oscillators for voice frequency circuits - Google Patents

Bridge-stabilised oscillators for voice frequency circuits

Info

Publication number
GB555523A
GB555523A GB4072/42A GB407242A GB555523A GB 555523 A GB555523 A GB 555523A GB 4072/42 A GB4072/42 A GB 4072/42A GB 407242 A GB407242 A GB 407242A GB 555523 A GB555523 A GB 555523A
Authority
GB
United Kingdom
Prior art keywords
bridge
oscillators
stabilised
voice frequency
frequency 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
GB4072/42A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB555523A publication Critical patent/GB555523A/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
    • H03B25/00—Simultaneous generation by a free-running oscillator of oscillations having different frequencies
    • 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
    • H03B5/14—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted
    • H03B5/16—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted active element in amplifier being vacuum tube

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Telephonic Communication Services (AREA)

Abstract

555,523. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. March 27, 1942, No. 4072. Convention date, Dec. 31, 1940. [Class 40 (iv)] [Also in Group XL] A toll line key-pulsing system employs 6 bridge-stabilized oscillators 01 ... 6 (see Group XL) connected in pairs (or alternatively in threes) in different combinations to supply 12 output circuits 3. The methods of connection are explained with reference to Figs. 3, 4, 5 (not shown).
GB4072/42A 1940-12-31 1942-03-27 Bridge-stabilised oscillators for voice frequency circuits Expired GB555523A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US372557A US2303485A (en) 1940-12-31 1940-12-31 Bridge-stabilized oscillator for voice frequency circuits

Publications (1)

Publication Number Publication Date
GB555523A true GB555523A (en) 1943-08-26

Family

ID=23468652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4072/42A Expired GB555523A (en) 1940-12-31 1942-03-27 Bridge-stabilised oscillators for voice frequency circuits

Country Status (2)

Country Link
US (1) US2303485A (en)
GB (1) GB555523A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR952394A (en) * 1942-12-16 1949-11-16 Telecommunications Sa Device for stabilizing oscillators
US2789162A (en) * 1952-03-01 1957-04-16 Gen Electric Wave amplifying circuits

Also Published As

Publication number Publication date
US2303485A (en) 1942-12-01

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