FR844373A - Improvements to frequency-selective electrical systems - Google Patents

Improvements to frequency-selective electrical systems

Info

Publication number
FR844373A
FR844373A FR844373DA FR844373A FR 844373 A FR844373 A FR 844373A FR 844373D A FR844373D A FR 844373DA FR 844373 A FR844373 A FR 844373A
Authority
FR
France
Prior art keywords
frequency
electrical systems
selective electrical
selective
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
Other languages
French (fr)
Inventor
James Robinson
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 filed Critical
Application granted granted Critical
Publication of FR844373A publication Critical patent/FR844373A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/545—Filters comprising resonators of piezoelectric or electrostrictive material including active elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/542—Filters comprising resonators of piezoelectric or electrostrictive material including passive elements

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Filters And Equalizers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
FR844373D 1937-10-06 1938-10-06 Improvements to frequency-selective electrical systems Expired FR844373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27130/37A GB509040A (en) 1937-10-06 1937-10-06 Improvements in electrical frequency selective circuits

Publications (1)

Publication Number Publication Date
FR844373A true FR844373A (en) 1939-07-24

Family

ID=10254703

Family Applications (1)

Application Number Title Priority Date Filing Date
FR844373D Expired FR844373A (en) 1937-10-06 1938-10-06 Improvements to frequency-selective electrical systems

Country Status (3)

Country Link
US (1) US2266658A (en)
FR (1) FR844373A (en)
GB (4) GB509040A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349347A (en) * 1967-10-24 Sauerland electric wave filter
US2923900A (en) * 1960-02-02 Poschenrieder
US2421026A (en) * 1943-07-08 1947-05-27 Bell Telephone Labor Inc Delay device
US2524781A (en) * 1945-06-18 1950-10-10 Standard Telephones Cables Ltd Filter
US2533802A (en) * 1945-07-20 1950-12-12 Cornell Dubilier Electric Selective amplifier
US2528365A (en) * 1947-07-01 1950-10-31 Crosley Broadcasting Corp Automatic frequency control
US2575047A (en) * 1948-07-14 1951-11-13 Murray G Crosby Exalted carrier receiver
US2579996A (en) * 1949-07-28 1951-12-25 Rca Corp Frequency selective signal amplifying system
US2859416A (en) * 1955-07-18 1958-11-04 Motorola Inc Filter
US2913682A (en) * 1956-07-02 1959-11-17 Hermes Electronics Co Hybrid type filter networks
US2959752A (en) * 1959-03-25 1960-11-08 Hycon Eastern Inc Selective low distortion crystal filter
US3170120A (en) * 1960-09-23 1965-02-16 Garold K Jensen Active comb filter
NL282567A (en) * 1961-08-29
US3416104A (en) * 1965-05-05 1968-12-10 Filtech Corp Band-pass crystal filters
US3483473A (en) * 1966-04-04 1969-12-09 Motorola Inc Frequency converting and selecting system including mixer circuit with field effect transistor coupled to band-pass filter through impedance inverting circuit
US3505617A (en) * 1968-02-12 1970-04-07 Us Navy Ripple reduction in a half-lattice crystal filter using three paralleled crystals resonant at lower,center and upper edge of pass-band
US3510794A (en) * 1968-03-21 1970-05-05 Philamon Lab Inc Multiple tuning fork resonator filter with feedback
US3739286A (en) * 1971-07-06 1973-06-12 J Arnold Crystal filter with temperature compensation
US3783418A (en) * 1973-01-04 1974-01-01 Johnson Electronics Inc Crystal filtering device
DE3006692C2 (en) * 1980-02-22 1983-04-21 Wandel & Goltermann Gmbh & Co, 7412 Eningen Quartz bandpass filter in which the non-linearity of the loss resistance of quartz resonators is taken into account
US4554678A (en) * 1982-12-13 1985-11-19 Honeywell Inc. Wireless receiver having crystal filter at outputs of preamplifier

Also Published As

Publication number Publication date
GB509235A (en) 1939-07-06
GB515739A (en) 1939-12-13
US2266658A (en) 1941-12-16
GB515640A (en) 1939-12-11
GB509040A (en) 1939-07-06

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