GB845267A - Improvements relating to electronic circuits - Google Patents

Improvements relating to electronic circuits

Info

Publication number
GB845267A
GB845267A GB3004855A GB3004855A GB845267A GB 845267 A GB845267 A GB 845267A GB 3004855 A GB3004855 A GB 3004855A GB 3004855 A GB3004855 A GB 3004855A GB 845267 A GB845267 A GB 845267A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
time constant
circuit
response
input
signal
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
GB3004855A
Inventor
Anthony Gilbert Kay
Richard Hope Kelsall
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.)
Metropolitan-Vickers Electrical Co Ltd
Original Assignee
Metropolitan-Vickers Electrical Co Ltd
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

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06GANALOGUE COMPUTERS
    • G06G7/00Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/26Arbitrary function generators
    • G06G7/28Arbitrary function generators for synthesising functions by piecewise approximation
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06GANALOGUE COMPUTERS
    • G06G7/00Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/24Arrangements for performing computing operations, e.g. operational amplifiers for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

Abstract

845,267. Non-linear valve circuits. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Oct. 24, 1956 [Oct. 20, 1955], No. 30048/55. Class 40(6). [Also in Group XXXVI.] A non-linear circuit for simulating the response of a physical system to an input stimulus, and especially where the speed or time constant of the response varies with the level of the stimulus or of the response, comprises a direct-coupled valve amplifier provided with a negative feedback loop having an adjustable time constant and means for automatically adjusting the time constant in accordance with the signal level applied to the circuit. The input signal V t is applied through resistor R 2 to the grid of valve V 1 the output from which is coupled back to the grid through cathode-follower V 2 . D.C. supply 2 and resistor R1 and capacitor C connected in parallel. In order to reduce the time constant of the feedback loop in steps at predetermined levels of the output signal V 0 , resistors R 3 and R 4 which are connected in series with respective diodes of the double diode V 3 , are connected successively in parallel with resistor R 1 as the signal level increases so as to overcome the bias applied to the diodes from potentiometers Pi, P 2 respectively, the potentials across the potentiometers being stabilized by discharge tubes V 4 , V 5 . As a result, the time constant of the feed back circuit decreases as the level of the input signal is increased and the response of the circuit to an input step signal becomes more rapid, Figs. 3b, 3c (not shown) while for steady-state conditions the input/output characteristic of the circuit is such that the incremental gain is greatest for small values of V i and V 0 , as shown in Fig. 3a.
GB3004855A 1955-10-20 1955-10-20 Improvements relating to electronic circuits Expired GB845267A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3004855A GB845267A (en) 1955-10-20 1955-10-20 Improvements relating to electronic circuits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3004855A GB845267A (en) 1955-10-20 1955-10-20 Improvements relating to electronic circuits
FR1160056A FR1160056A (en) 1955-10-20 1956-10-19 Improvements in circuit simulators

Publications (1)

Publication Number Publication Date
GB845267A true true GB845267A (en) 1960-08-17

Family

ID=10301412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3004855A Expired GB845267A (en) 1955-10-20 1955-10-20 Improvements relating to electronic circuits

Country Status (2)

Country Link
FR (1) FR1160056A (en)
GB (1) GB845267A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010802A1 (en) * 1988-05-03 1989-11-16 Endress U. Hauser Gmbh U. Co. Circuitry for self-excitation of self-resonant vibrations in a mechanical vibrating system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010802A1 (en) * 1988-05-03 1989-11-16 Endress U. Hauser Gmbh U. Co. Circuitry for self-excitation of self-resonant vibrations in a mechanical vibrating system
EP0343403A1 (en) * 1988-05-03 1989-11-29 Endress u. Hauser GmbH u. Co. Circuit for the self-excitation of a mechanical oscillation system to its characteristic resonant frequency
US5029268A (en) * 1988-05-03 1991-07-02 Endress U. Hauser Gmbh U. Co. Circuit arrangement for self-excitation of a mechanical oscillation system to natural resonant oscillations

Also Published As

Publication number Publication date Type
FR1160056A (en) 1958-07-07 grant

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