GB1042558A - Improvements in or relating to pulse correction circuits - Google Patents

Improvements in or relating to pulse correction circuits

Info

Publication number
GB1042558A
GB1042558A GB2830765A GB2830765A GB1042558A GB 1042558 A GB1042558 A GB 1042558A GB 2830765 A GB2830765 A GB 2830765A GB 2830765 A GB2830765 A GB 2830765A GB 1042558 A GB1042558 A GB 1042558A
Authority
GB
United Kingdom
Prior art keywords
pulse
base
relay
delay
july
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
GB2830765A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB1042558A publication Critical patent/GB1042558A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/94—Generating pulses having essentially a finite slope or stepped portions having trapezoidal shape
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/12—Shaping pulses by steepening leading or trailing edges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
  • Pulse Circuits (AREA)

Abstract

1,042,558. Pulse shaping. SIEMENS & HALSKE A.G. July 5, 1965 [July 6, 1964], No. 28307/65. Heading H3T. The slope of the leading or trailing edge of a pulse applied to the base of a transistor is varied by feeding back the collector voltage through a capacitor, diode and variable resistor to the base, the junction between the capacitor and diode being connected to the emitter. In Fig. 1 telephone dialling A.C. pulses from an amplifier with A.G.C. are fed through transformer U and full-wave rectifier G1, G2 to the base of the transistor whose collector current operates a relay I. The leading edge of the pulse discharges C 3 and applies negative feedback through G3 and R 4 to the base to delay the rise of the pulse. Similarly the trailing edge charges C 3 through G4 and R 4 to apply negative feedback to delay the fall of input potential. Thus by adjusting the tap on R 4 it is possible to alter the effective length of the pulse, i.e. the time between energization and release of the relay, to compensate for changes in pulse-length produced by other parts of the transmission system. The slight increase in transit time can be compensated by connecting G3 directly to the base (as in the broken line) thus introducing a permanent delay at the end of the pulse. Different capacitance values can be switched in for C 3 . R 1 prevents the feedback voltage from being shunted by the rectifier circuit G1, G2, C 2 . R 4 may be provided with a calibrated scale for reproducible setting. The operate and release valves of the relay I may also be adjustable.
GB2830765A 1964-07-06 1965-07-05 Improvements in or relating to pulse correction circuits Expired GB1042558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES91899A DE1210036B (en) 1964-07-06 1964-07-06 Circuit arrangement for the adjustable correction of the length of direct current pulses to be evaluated, in particular rectified tone dialing pulses

Publications (1)

Publication Number Publication Date
GB1042558A true GB1042558A (en) 1966-09-14

Family

ID=7516825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2830765A Expired GB1042558A (en) 1964-07-06 1965-07-05 Improvements in or relating to pulse correction circuits

Country Status (6)

Country Link
BE (1) BE666464A (en)
DE (1) DE1210036B (en)
FI (1) FI41568B (en)
GB (1) GB1042558A (en)
NL (2) NL6508491A (en)
SE (1) SE312575B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326105A (en) * 1979-12-21 1982-04-20 Mitel Corporation Dial pulse detector
GB2257856A (en) * 1991-07-19 1993-01-20 Samsung Electronics Co Ltd Data output buffer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326105A (en) * 1979-12-21 1982-04-20 Mitel Corporation Dial pulse detector
GB2257856A (en) * 1991-07-19 1993-01-20 Samsung Electronics Co Ltd Data output buffer
US5315173A (en) * 1991-07-19 1994-05-24 Samsung Electronics Co., Ltd. Data buffer circuit with delay circuit to increase the length of a switching transition period during data signal inversion

Also Published As

Publication number Publication date
FI41568B (en) 1969-09-01
BE666464A (en) 1966-01-06
NL137673C (en)
SE312575B (en) 1969-07-21
DE1210036B (en) 1966-02-03
NL6508491A (en) 1966-01-07

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