GB1369715A - Timing circuits - Google Patents

Timing circuits

Info

Publication number
GB1369715A
GB1369715A GB932572A GB932572A GB1369715A GB 1369715 A GB1369715 A GB 1369715A GB 932572 A GB932572 A GB 932572A GB 932572 A GB932572 A GB 932572A GB 1369715 A GB1369715 A GB 1369715A
Authority
GB
United Kingdom
Prior art keywords
amplifier
input
output
timing circuit
feb
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
GB932572A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB932572A priority Critical patent/GB1369715A/en
Publication of GB1369715A publication Critical patent/GB1369715A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

  • Control Of Stepping Motors (AREA)

Abstract

1369715 Timing circuits FERRANTI Ltd 19 Feb 1973 [29 Feb 1972] 9325/72 Heading H3T A timing circuit includes a resistor R 1 and a capacitor C 1 having their junction point connected to the input of an amplifier A 1 having substantially unit gain and a potential divider R 2 , R 3 connected between the amplifier output and a voltage source E, an intermediate point X on the divider providing the charging voltage for the elements R 1 , C 1 . The amplifier A 1 may be a differential amplifier or a single input amplifier. In operation, as the capacitor C 1 charges, the input and the output of amplifier A 1 are maintained at the same voltage level. A larger time constant is obtained as a result of bypassing part of the charging current for C 1 via R 2 . The timing circuit may be followed by a threshold detector A 2 having a threshold bias derived from the same voltage source E. The timing circuit may be used in servo or stepping motor applications (Figs. 3, 4, not shown) by connecting a pair of parallel connected diodes across either R 1 or R 2 so that the output of amplifier A 1 follows rapid changes in the input E either instantaneously or very slowly, respectively.
GB932572A 1973-02-19 1973-02-19 Timing circuits Expired GB1369715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB932572A GB1369715A (en) 1973-02-19 1973-02-19 Timing circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB932572A GB1369715A (en) 1973-02-19 1973-02-19 Timing circuits

Publications (1)

Publication Number Publication Date
GB1369715A true GB1369715A (en) 1974-10-09

Family

ID=9869786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB932572A Expired GB1369715A (en) 1973-02-19 1973-02-19 Timing circuits

Country Status (1)

Country Link
GB (1) GB1369715A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149269A (en) * 1983-10-31 1985-06-05 Rca Corp Driver amplifier for an image display device
GB2329732A (en) * 1997-09-26 1999-03-31 Motorola Inc Automatic voltage level control circuit having select time constants
CN102717292A (en) * 2012-06-21 2012-10-10 曹善书 Stepping motor dividing head device for linear cutting machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149269A (en) * 1983-10-31 1985-06-05 Rca Corp Driver amplifier for an image display device
US4577234A (en) * 1983-10-31 1986-03-18 Rca Corporation Driver amplifier for an image display device
GB2329732A (en) * 1997-09-26 1999-03-31 Motorola Inc Automatic voltage level control circuit having select time constants
GB2329732B (en) * 1997-09-26 2000-01-12 Motorola Inc Automatic voltage level control circuit
CN102717292A (en) * 2012-06-21 2012-10-10 曹善书 Stepping motor dividing head device for linear cutting machine

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee