GB492337A - Rectifier for television signals - Google Patents

Rectifier for television signals

Info

Publication number
GB492337A
GB492337A GB7680/37A GB768037A GB492337A GB 492337 A GB492337 A GB 492337A GB 7680/37 A GB7680/37 A GB 7680/37A GB 768037 A GB768037 A GB 768037A GB 492337 A GB492337 A GB 492337A
Authority
GB
United Kingdom
Prior art keywords
carrier frequency
choke
march
frequency
diode
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
GB7680/37A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB492337A publication Critical patent/GB492337A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
    • H03D1/16—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of discharge tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Picture Signal Circuits (AREA)

Abstract

492,337. Valve amplifying and detecting circuits; television. RADIOAKT.-GES. D. S. LOEWE. March 16, 1937, No. 7680. Convention date, March 19, 1936. [Classes 40 (iii) and 40 (v)] A television detector comprises an anode bend rectifier 1 directly coupled to a following amplifier 6. The carrier frequency energy in the anode circuits of the valves 1, 6 are balanced against one another to remove this frequency from the output. The Figure shows a differential condenser 10-12 for ensuring an accurate balance and a resistance 14 and choke 13 in the feed to the cathode-ray tube to further assist in the removal of carrier frequency. The choke 13 may be resonant to the highest image frequency, varying the damping produced by resistance 14 enables the desired cut-off for the carrier frequency to be obtained. Synchronizing impulses are obtained by a diode 16 which may be contained in the envelope of the valve 1. The separation of the synchronizing signals is effected by the bias potential applied to the diode 16, line and frame impulses being taken from transformers 18a, 18b.
GB7680/37A 1936-03-20 1937-03-16 Rectifier for television signals Expired GB492337A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER95858D DE730998C (en) 1936-03-20 1936-03-20 Television receiving circuitry

Publications (1)

Publication Number Publication Date
GB492337A true GB492337A (en) 1938-09-16

Family

ID=25944618

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4541/37A Expired GB490676A (en) 1936-03-20 1937-02-15 Improvements in or relating to synchronising pulse separating circuits for teleyision systems
GB7680/37A Expired GB492337A (en) 1936-03-20 1937-03-16 Rectifier for television signals

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB4541/37A Expired GB490676A (en) 1936-03-20 1937-02-15 Improvements in or relating to synchronising pulse separating circuits for teleyision systems

Country Status (5)

Country Link
US (1) US2201794A (en)
DE (1) DE730998C (en)
FR (2) FR819404A (en)
GB (2) GB490676A (en)
NL (1) NL49860C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458365A (en) * 1946-09-11 1949-01-04 Motorola Inc Television receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911317A (en) * 1973-08-24 1975-10-07 Bell Telephone Labor Inc Current bootstrap to reduce interelectrode capacitance effect in a vacuum tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458365A (en) * 1946-09-11 1949-01-04 Motorola Inc Television receiver

Also Published As

Publication number Publication date
GB490676A (en) 1938-08-15
US2201794A (en) 1940-05-21
NL49860C (en) 1941-02-15
DE730998C (en) 1943-01-30
FR819408A (en) 1937-10-20
FR819404A (en) 1937-10-19

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