GB586137A - Improvements in or relating to thermionic valve circuits for modifying potentials - Google Patents

Improvements in or relating to thermionic valve circuits for modifying potentials

Info

Publication number
GB586137A
GB586137A GB645/44A GB64544A GB586137A GB 586137 A GB586137 A GB 586137A GB 645/44 A GB645/44 A GB 645/44A GB 64544 A GB64544 A GB 64544A GB 586137 A GB586137 A GB 586137A
Authority
GB
United Kingdom
Prior art keywords
impedance
amplifier
potential
circuit
terminal
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
GB645/44A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US631436A priority Critical patent/US2651719A/en
Publication of GB586137A publication Critical patent/GB586137A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
    • G06G7/182—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using magnetic elements
    • 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
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
    • H03K4/20—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor using a tube with negative feedback by capacitor, e.g. Miller integrator
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/40—Circuit details for pick-up tubes

Abstract

586,137. Valve amplifying and pulse shaping circuits. WHITE, E. L. C., JAMES, I. J. P., and BEST, J. E. Jan. 12, 1944, No. 645. [Class 40 (v)] A circuit for modifying a potential comprises a first impedance connecting the potential source to a negative feed-back amplifier arranged to have a low impedance over a certain range of frequencies so that the current flowing is determined mainly by the potential and the impedance, a second impedance, of different type from the first, being included in the circuit of the amplifier and having an impedance large compared with the amplifier, whereby the whole or part of the current flows in the second impedance to develop the modified potential. As shown in Fig. 1, the potential to be modified is applied at terminal 10 over a first impedance 20 to the direct-coupled amplifying valve 12 feeding a cathode follower 13. Due to the negative feed-back connection between the cathode of valve 13 and the grid of valve 12 over the second impedance 21, the amplifier presents a low input impedance. The current through impedance 20 is thus dependent on the applied potential and the impedance and passes through the second impedance 21 to develop the modified potential which appears at terminal 11. By choosing impedances 20, 21 to be a resistance and capacity respectively, the circuit functions as an integrating circuit or a differentiating circuit if the reverse choice is made. In a modification, Fig. 2, a single amplifier is used, pulses applied at terminal 10 appearing as saw-tooth waves at terminal 11. In a further modification, Fig. 3 (not shown), the input is applied over impedance 20 to a grounded-grid amplifier with a cathode load, the anode load comprising the second impedance. In a further modification, Fig. 4 (not shown), the first impedance shunts the cathode resistance of an amplifier, the anode load again serving as the second impedance. Reference has been directed by the Comptroller to Specification 575,250.
GB645/44A 1944-01-12 1944-01-12 Improvements in or relating to thermionic valve circuits for modifying potentials Expired GB586137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US631436A US2651719A (en) 1944-01-12 1945-11-28 Circuits for modifying potentials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13071/49A GB696811A (en) 1949-05-17 1949-05-17 Improvements relating to electric circuit arrangements embodying electron discharge valves

Publications (1)

Publication Number Publication Date
GB586137A true GB586137A (en) 1947-03-07

Family

ID=10016264

Family Applications (2)

Application Number Title Priority Date Filing Date
GB645/44A Expired GB586137A (en) 1944-01-12 1944-01-12 Improvements in or relating to thermionic valve circuits for modifying potentials
GB13071/49A Expired GB696811A (en) 1944-01-12 1949-05-17 Improvements relating to electric circuit arrangements embodying electron discharge valves

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB13071/49A Expired GB696811A (en) 1944-01-12 1949-05-17 Improvements relating to electric circuit arrangements embodying electron discharge valves

Country Status (1)

Country Link
GB (2) GB586137A (en)

Also Published As

Publication number Publication date
GB696811A (en) 1953-09-09

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