ES177007A1 - Mejors en sistemas de transmisión telefónica en dos sentidos - Google Patents

Mejors en sistemas de transmisión telefónica en dos sentidos

Info

Publication number
ES177007A1
ES177007A1 ES177007A ES177007A ES177007A1 ES 177007 A1 ES177007 A1 ES 177007A1 ES 177007 A ES177007 A ES 177007A ES 177007 A ES177007 A ES 177007A ES 177007 A1 ES177007 A1 ES 177007A1
Authority
ES
Spain
Prior art keywords
senses
transmission systems
telephone transmission
telephone
systems
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
ES177007A
Other languages
English (en)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Standard Electrica SA
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 Alcatel Espana SA, Standard Electrica SA filed Critical Alcatel Espana SA
Publication of ES177007A1 publication Critical patent/ES177007A1/es
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
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube
ES177007A 1938-06-28 1947-02-28 Mejors en sistemas de transmisión telefónica en dos sentidos Expired ES177007A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US216212A US2165517A (en) 1938-06-28 1938-06-28 Oscillation generator

Publications (1)

Publication Number Publication Date
ES177007A1 true ES177007A1 (es) 1947-04-16

Family

ID=22806196

Family Applications (1)

Application Number Title Priority Date Filing Date
ES177007A Expired ES177007A1 (es) 1938-06-28 1947-02-28 Mejors en sistemas de transmisión telefónica en dos sentidos

Country Status (5)

Country Link
US (1) US2165517A (es)
ES (1) ES177007A1 (es)
FR (1) FR856963A (es)
GB (1) GB529291A (es)
NL (1) NL62295C (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451858A (en) * 1945-01-26 1948-10-19 Gen Electric Controlled frequency oscillator
US2586167A (en) * 1945-07-03 1952-02-19 Us Navy Oscillator
US2498759A (en) * 1947-03-24 1950-02-28 Rca Corp Wide band oscillator and modulator
US2683810A (en) * 1949-03-30 1954-07-13 Marconi Wireless Telegraph Co Piezoelectric crystal oscillator
US2981899A (en) * 1958-08-12 1961-04-25 Hahnel Alwin Frequency divider
DE1116280B (de) * 1959-12-15 1961-11-02 Standard Elektrik Lorenz Ag Frequenzstabilisierungsschaltung fuer Oszillatoren

Also Published As

Publication number Publication date
NL62295C (es)
US2165517A (en) 1939-07-11
GB529291A (en) 1940-11-18
FR856963A (fr) 1940-08-19

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