GB1292054A

GB1292054A – Improvements in or relating to pulse generators
– Google Patents

GB1292054A – Improvements in or relating to pulse generators
– Google Patents
Improvements in or relating to pulse generators

Info

Publication number
GB1292054A

GB1292054A
GB1251869A
GB1251869A
GB1292054A
GB 1292054 A
GB1292054 A
GB 1292054A
GB 1251869 A
GB1251869 A
GB 1251869A
GB 1251869 A
GB1251869 A
GB 1251869A
GB 1292054 A
GB1292054 A
GB 1292054A
Authority
GB
United Kingdom
Prior art keywords
diode
level
current
delay circuit
switch
Prior art date
1969-03-10
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
GB1251869A
Inventor
Edward Albert Martin
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.)

Gemalto Terminals Ltd

Original Assignee
Solartron Electronic Group 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.)
1969-03-10
Filing date
1969-03-10
Publication date
1972-10-11

1969-03-10
Application filed by Solartron Electronic Group Ltd
filed
Critical
Solartron Electronic Group Ltd

1969-03-10
Priority to GB1251869A
priority
Critical
patent/GB1292054A/en

1970-03-07
Priority to DE19702010836
priority
patent/DE2010836A1/en

1970-03-09
Priority to FR7008337A
priority
patent/FR2039578A5/fr

1972-10-11
Publication of GB1292054A
publication
Critical
patent/GB1292054A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H03—ELECTRONIC CIRCUITRY

H03K—PULSE TECHNIQUE

H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits

H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses

H03K3/313—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic

H03K3/315—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with two electrodes, one or two potential-jump barriers, and exhibiting a negative resistance characteristic the devices being tunnel diodes

Abstract

1292054 Pulse generator SOLARTRON ELECTRONIC GROUP Ltd 9 March 1970 [10 March 1969] 12518/69 Heading H3T A pulse generator has a tunnel diode 41 coupled to feedback means including first and second non-inductive delay circuits 181, 191 , 171 and 57, 58, 221, the feedback means is such that in operation the diode can automatically switch from its low voltage to its high voltage state and vice-versa, the feedback by the first delay circuit 181, 191, 171 is insufficient to effect such switching, and the time constant of the first delay circuit 181, 191, 171 is shorter than that of the second delay circuit 57, 58, 221. When the tunnel diode 41 is in its low voltage state at current level (28, Fig. 2, not shown) the output from transistor 51 is high so that the feedback via the delay circuit 181, 191, 171 increases the current through the diode to a current level (27) insufficient to change the state of the diode. Then feedback via the longer time constant delay circuit 57, 58, 221 further increases the current through the diode above the level (29) to cause the diode to switch to its high voltage state The output from transistor 51 changes to a low level and the delay circuits act as integrating circuits. Delay circuit 181, 191, 171 causes the current through the diode to decrease to a level (28) and delay circuit 57, 58, 221 further decreases the current through the diode to a level (30) where it changes back to the low voltage state. The above is repeated to generate an output at 131. The larger time constant circuit includes resistors 181, 57, 58, 211, 60, capacitor 221 and a transistor 59. The pulse generator may be made to’ operate at a higher frequency than its natural frequency by triggering it with higher frequency trigger pulses at 141 capable of causing current through the diode to swing above the level (29) and below the level (30) such that the pulse generator acts as a pulse frequency divider synchronized to the trigger pulses. If the trigger pulses are not capable of this then the generator is synchronized to the input trigger pulses. With switch 45 closed to short capacitor 42, switch 46 is open to render the longer time constant circuit 57, 58, 221 inoperative so that the tunnel diode is then triggered to its two stable states by input trigger pulses applied at 141. Alternatively switch 46 may be replaced by a switch connected across capacitor 221. The pulse generator may be used as a triggering circuit for an oscilloscope to synchronize the time base with the waveform to be displayed so that the time base locks on a sub harmonic of the waveform frequency. A variable attenuator or limiter or preamplifier can be included to the input of the generator.

GB1251869A
1969-03-10
1969-03-10
Improvements in or relating to pulse generators

Expired

GB1292054A
(en)

Priority Applications (3)

Application Number
Priority Date
Filing Date
Title

GB1251869A

GB1292054A
(en)

1969-03-10
1969-03-10
Improvements in or relating to pulse generators

DE19702010836

DE2010836A1
(en)

1969-03-10
1970-03-07

Pulse generator

FR7008337A

FR2039578A5
(en)

1969-03-10
1970-03-09

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

GB1251869A

GB1292054A
(en)

1969-03-10
1969-03-10
Improvements in or relating to pulse generators

Publications (1)

Publication Number
Publication Date

GB1292054A
true

GB1292054A
(en)

1972-10-11

Family
ID=10006069
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB1251869A
Expired

GB1292054A
(en)

1969-03-10
1969-03-10
Improvements in or relating to pulse generators

Country Status (3)

Country
Link

DE
(1)

DE2010836A1
(en)

FR
(1)

FR2039578A5
(en)

GB
(1)

GB1292054A
(en)

1969

1969-03-10
GB
GB1251869A
patent/GB1292054A/en
not_active
Expired

1970

1970-03-07
DE
DE19702010836
patent/DE2010836A1/en
active
Pending

1970-03-09
FR
FR7008337A
patent/FR2039578A5/fr
not_active
Expired

Also Published As

Publication number
Publication date

DE2010836A1
(en)

1970-09-24

FR2039578A5
(en)

1971-01-15

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Gated Frequency Dividing Circuit for Improved Resolution in Digital Time Interval Measurements

Legal Events

Date
Code
Title
Description

1973-02-21
PS
Patent sealed

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