GB612117A - Improvements in or relating to d.c. amplifiers and signal maintaining circuits associated therewith - Google Patents

Improvements in or relating to d.c. amplifiers and signal maintaining circuits associated therewith

Info

Publication number
GB612117A
GB612117A GB30387/45A GB3038745A GB612117A GB 612117 A GB612117 A GB 612117A GB 30387/45 A GB30387/45 A GB 30387/45A GB 3038745 A GB3038745 A GB 3038745A GB 612117 A GB612117 A GB 612117A
Authority
GB
United Kingdom
Prior art keywords
pulses
time constant
during
amplifier
capacitor
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
GB30387/45A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television 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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB612117A publication Critical patent/GB612117A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

612,117. Valve amplifying circuits. PHILCO RADIO & TELEVISION CORPORATION. Nov. 13, 1945, No. 30387. Convention date; Sept. 1, 1944. [Class 40 (vi)] A D.C. amplifier is associated with means for maintaining an output during short periods when a sporadic signal is absent. Pulse radar signals are applied to detector circuit 10 and the time constant of elements 14, 15 is considerably longer than the interval between pulses so that the input to amplifier 16 is substantially a direct voltage with amplitude depending on the amplitude of the pulses. During the incidence of a normal signal, diode 21 conducts to short-circuit high resistance 19 and produce a relatively short time constant charging path for capacitor 22. If the input pulses fade, the anode voltage of valve 16 rises to cut off diode 21. Capacitor 22 is now in a long time constant circuit and maintains the grid voltage of output cathode follower 20 constant during the fading period, at a level determined by potentiometer 26. Specification 612,119 is referred to.
GB30387/45A 1944-09-01 1945-11-13 Improvements in or relating to d.c. amplifiers and signal maintaining circuits associated therewith Expired GB612117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US612117XA 1944-09-01 1944-09-01

Publications (1)

Publication Number Publication Date
GB612117A true GB612117A (en) 1948-11-09

Family

ID=22034350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30387/45A Expired GB612117A (en) 1944-09-01 1945-11-13 Improvements in or relating to d.c. amplifiers and signal maintaining circuits associated therewith

Country Status (1)

Country Link
GB (1) GB612117A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319574A3 (en) * 2001-12-11 2006-05-17 Toyoda Koki Kabushiki Kaisha Controller and control method for an electric power steering apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1319574A3 (en) * 2001-12-11 2006-05-17 Toyoda Koki Kabushiki Kaisha Controller and control method for an electric power steering apparatus

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