GB520422A - Improvements in band-pass filters - Google Patents

Improvements in band-pass filters

Info

Publication number
GB520422A
GB520422A GB11350/39A GB1135039A GB520422A GB 520422 A GB520422 A GB 520422A GB 11350/39 A GB11350/39 A GB 11350/39A GB 1135039 A GB1135039 A GB 1135039A GB 520422 A GB520422 A GB 520422A
Authority
GB
United Kingdom
Prior art keywords
condenser
band
pass filters
valves
impedance
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
GB11350/39A
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine Corp
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 Hazeltine Corp filed Critical Hazeltine Corp
Publication of GB520422A publication Critical patent/GB520422A/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
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
    • 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
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • 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
    • H03H7/1716—Comprising foot-point elements
    • H03H7/1725—Element to ground being common to different shunt paths, i.e. Y-structure
    • 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
    • H03H7/175—Series LC in series path
    • 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
    • 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
    • H03H7/1791—Combined LC in shunt or branch path

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

520,422. Impedance networks. HAZELTINE CORPORATION. Oct. 20, 1938, No. 11350/39. Convention date, Nov. 10, 1937. Divided out of 510,652. [Class 40 (iii)] The known band-pass filter of Fig. 2 is modified by replacing condenser 2C1 and the terminating image impedance R by a shunt condenser 2C1, Fig. 1, and resistance R1. The condenser 2C1, Fig. 1, may be constituted by the inherent electrode capacity of valves 10, 12. The Specification gives design formulae for the filter of Fig. 1 and representative circuit valves:
GB11350/39A 1937-11-10 1938-10-20 Improvements in band-pass filters Expired GB520422A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US510652XA 1937-11-10 1937-11-10

Publications (1)

Publication Number Publication Date
GB520422A true GB520422A (en) 1940-04-23

Family

ID=21969109

Family Applications (2)

Application Number Title Priority Date Filing Date
GB11350/39A Expired GB520422A (en) 1937-11-10 1938-10-20 Improvements in band-pass filters
GB30318/38A Expired GB510652A (en) 1937-11-10 1938-10-20 Improvements in band-pass filters

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB30318/38A Expired GB510652A (en) 1937-11-10 1938-10-20 Improvements in band-pass filters

Country Status (1)

Country Link
GB (2) GB520422A (en)

Also Published As

Publication number Publication date
GB510652A (en) 1939-08-04

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