GB294061A - Improvements in crystal controlled high power oscillators and amplifiers - Google Patents

Improvements in crystal controlled high power oscillators and amplifiers

Info

Publication number
GB294061A
GB294061A GB3547527A GB3547527A GB294061A GB 294061 A GB294061 A GB 294061A GB 3547527 A GB3547527 A GB 3547527A GB 3547527 A GB3547527 A GB 3547527A GB 294061 A GB294061 A GB 294061A
Authority
GB
United Kingdom
Prior art keywords
crystals
crystal
inductance
circuit
grid
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
GB3547527A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB294061A publication Critical patent/GB294061A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0138—Electrical filters or coupling circuits
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • 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
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/0014—Structural aspects of oscillators
    • H03B2200/0018—Structural aspects of oscillators relating to the cutting angle of a crystal, e.g. AT cut quartz
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

294,061. Standard Telephones & Cables, Ltd., (Western Electric Co., Inc.). Dec. 31, 1927. Thermionic generators. -In a crystal-controlled oscillator, a number of crystals are connected in series with a view to the reduction of the voltage across each crystal; and constancy of frequency under temperature variations is secured by cutting some of the crystals parallel, and others perpendicular, to a natural face, or by other suitable matching of the crystals. The crystals may be independent of each other and may have the same or different natural frequencies. As shown in Fig. 2, a single crystal slap 1<1> is mounted between four pairs of electrodes 8 which are so wired to each other that the four sections of the crystals are connected in series. The whole is connected across the grid and filament of a valve 0 having an inductance or tuned circuit 2 in its plate circuit coupled to a load Z. Grid bias may be applied from a battery 4 through a shunted grid leak 5 and a choke coil 6. The crystal is stated to react as an inductance at the working frequency, and this inductance in combination with the output coil or circuit 2 and the inter-electrode capacity constitutes the main oscillatory circuit.
GB3547527A 1928-10-26 1927-12-31 Improvements in crystal controlled high power oscillators and amplifiers Expired GB294061A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3115628A GB324639A (en) 1928-10-26 1928-10-26 Improvements in two way electric signalling systems

Publications (1)

Publication Number Publication Date
GB294061A true GB294061A (en) 1928-07-19

Family

ID=10318865

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3547527A Expired GB294061A (en) 1928-10-26 1927-12-31 Improvements in crystal controlled high power oscillators and amplifiers
GB3115628A Expired GB324639A (en) 1928-02-18 1928-10-26 Improvements in two way electric signalling systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3115628A Expired GB324639A (en) 1928-02-18 1928-10-26 Improvements in two way electric signalling systems

Country Status (4)

Country Link
BE (1) BE356146A (en)
FR (2) FR665739A (en)
GB (2) GB294061A (en)
NL (1) NL26563C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0469193A1 (en) * 1990-08-03 1992-02-05 Koninklijke Philips Electronics N.V. Temperature stabilized crystal oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0469193A1 (en) * 1990-08-03 1992-02-05 Koninklijke Philips Electronics N.V. Temperature stabilized crystal oscillator
US5424601A (en) * 1990-08-03 1995-06-13 U.S. Philips Corporation Temperature stabilized crystal oscillator

Also Published As

Publication number Publication date
NL26563C (en)
FR665739A (en) 1929-09-23
GB324639A (en) 1930-01-27
BE356146A (en)
FR700781A (en) 1931-03-06

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