GB1332963A - Electronic circuit - Google Patents

Electronic circuit

Info

Publication number
GB1332963A
GB1332963A GB1332963DA GB1332963A GB 1332963 A GB1332963 A GB 1332963A GB 1332963D A GB1332963D A GB 1332963DA GB 1332963 A GB1332963 A GB 1332963A
Authority
GB
United Kingdom
Prior art keywords
signal
output
input
inverse
amplifiers
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
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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
Application filed by Rank Organization Ltd filed Critical Rank Organization Ltd
Publication of GB1332963A publication Critical patent/GB1332963A/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
    • G06G7/25—Arrangements for performing computing operations, e.g. operational amplifiers for discontinuous functions, e.g. backlash, dead zone, limiting absolute value or peak value
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1427—Control of position or direction using feedback using an analogue comparing device with non-linear amplifier chain

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Automation & Control Theory (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Position Or Direction (AREA)
  • Lens Barrels (AREA)
  • Feedback Control In General (AREA)

Abstract

1332963 Electric correspondence control systems RANK ORGANISATION Ltd 22 Dec 1971 [9 Feb 1971] 4254/71 Heading G1N An electrical circuit for developing an output signal in response to first and second independently variable input signals includes means for comparing the output with the second of the input signals and its inverse, and switching means (diodes) arranged so that the output normally depends upon the first input signal, but is limited by the second input signal. In an embodiment the desired and actual position signals of an actuator (e.g. for zooming or focusing a lens), applied to terminals 5 and 6 respectively, are compared in operational amplifier 3, the output of which is fed back as shown via 10 to one input of 3 and also to further operational amplifiers 1, 2. These also receive a maximum desired rate signal (the second input) from terminal 4. The arrangement is such that of this signal or its inverse is less than the error signal from 3 diode 13 or 17 (acting as a switch) conducts to establish a high loop gain feedback path through the amplifiers 3 and 1 or 2 to limit the output at 20 to the value set by the rate demand signal at 4.
GB1332963D 1971-02-09 1971-12-22 Electronic circuit Expired GB1332963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB425471 1971-02-09

Publications (1)

Publication Number Publication Date
GB1332963A true GB1332963A (en) 1973-10-10

Family

ID=9773648

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1332963D Expired GB1332963A (en) 1971-02-09 1971-12-22 Electronic circuit

Country Status (4)

Country Link
DE (1) DE2165921A1 (en)
FR (1) FR2124586B1 (en)
GB (1) GB1332963A (en)
NL (1) NL7200624A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5552007A (en) * 1978-10-11 1980-04-16 Canon Inc Lens driving device with limitation of movable position
US4349771A (en) * 1979-09-26 1982-09-14 Lucas Industries Limited Stepper motor control circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1220068A (en) * 1967-11-01 1971-01-20 Ultra Electronics Ltd Improvements in or relating to signal selection systems

Also Published As

Publication number Publication date
NL7200624A (en) 1972-08-11
FR2124586A1 (en) 1972-09-22
FR2124586B1 (en) 1974-08-02
DE2165921A1 (en) 1972-08-24

Similar Documents

Publication Publication Date Title
ES8106387A1 (en) Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems
US4119922A (en) Circuit for automatic volume compression or volume expansion
ES363454A1 (en) Electronic process controller having a two part error amplifier
US3252007A (en) Stabilized non-linear feedback amplifier
SE7601276L (en) CONTROL DEVICE
US3209266A (en) Function generators having multiple rations between input and output
US3849601A (en) Volume and tone controls for multichannel audio systems
US3649924A (en) Sampling amplifier
GB1332963A (en) Electronic circuit
GB1482553A (en) Television field deflection circuit
US2885471A (en) Automatic iris control
US2985808A (en) Pulse length controlled servo system
US3252105A (en) Rate limiting apparatus including active elements
ES357831A1 (en) Motor control system with feedback and variable gain amplifier responsive to current
US3747007A (en) Variable compensation for feedback control systems
GB989569A (en) A servo system
GB1344009A (en) Electrical signal attenuators
US3482113A (en) Variable transfer function circuit
US2917694A (en) Stabilized servo system
US3217184A (en) Two pole solid state a. c. switch
US3167647A (en) Electrical analog computing circuit with square root extraction capability
US2661449A (en) Electronic control apparatus
US4513253A (en) Electronic amplifier having a transmission factor that is variable by means of a controllable voltage, specifically an expander
US4103218A (en) Phase-shifting system for electronically scanning antennas
JPS5468267A (en) Servo recorder

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees