GB1349210A – Digital/analog converters
– Google Patents
GB1349210A – Digital/analog converters
– Google Patents
Digital/analog converters
Info
Publication number
GB1349210A
GB1349210A
GB535972A
GB535972A
GB1349210A
GB 1349210 A
GB1349210 A
GB 1349210A
GB 535972 A
GB535972 A
GB 535972A
GB 535972 A
GB535972 A
GB 535972A
GB 1349210 A
GB1349210 A
GB 1349210A
Authority
GB
United Kingdom
Prior art keywords
pulse
counter
stable
extended
gate
Prior art date
1971-02-05
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
GB535972A
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.)
Inductosyn Corp
Original Assignee
Inductosyn Corp
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.)
1971-02-05
Filing date
1972-02-04
Publication date
1974-04-03
1972-02-04
Application filed by Inductosyn Corp
filed
Critical
Inductosyn Corp
1974-04-03
Publication of GB1349210A
publication
Critical
patent/GB1349210A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M1/00—Analogue/digital conversion; Digital/analogue conversion
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
H03M1/00—Analogue/digital conversion; Digital/analogue conversion
H03M1/10—Calibration or testing
H03M1/1066—Mechanical or optical alignment
Abstract
1349210 Digital/analogue converters INDUCTOSYN CORP 4 Feb 1972 [5 Feb 1971] 5359/72 Heading G4H A digital/analogue converter in which the digital input is in the form of a pulse train, includes two counters 11, 12 (Figs. 4a, 4b) which, in the absence of a digital input pulse, are cycled in synchronism by a clock source on lead 20, the first counter receiving an extra pulse for each digital input pulse under the control of generator means 7. The counter outputs are combined in logic circuitry to derive analogue output signals sine #, cos # which may be applied to a position transducer. In the embodiment described a reference counter having a capacity N/2 is used in addition to the counters 11, 12 which are extended by bi-stables 220, 221 respectively to form effective counters of capacity N/2 a number of input pulses n resulting in output signals sine #, cos 0 from the logic circuitry where 0 = (n/N) x 360. In operation with a signal on lead 5, representing one direction of movement, setting bi-stable 214, a bi-stable 207 is set and reset by alternate digital input pulses to alternately set bi-stables 210, 211 which when set prime AND gates 237, 238 respectively. After the first pulse AND gate 237 is enabled by the output of a gate 234 and with bi-stable 220 reset an exclusive OR gate 242 applies a pulse direct to counter 11 (i.e. is a pulse having an effective weight of two in the extended counter). After the second pulse AND gate 238 is not enabled since it is inhibited by the output of bi-stable 214 and bi-stable 221 is not set since bi-stable 211 is set so consequently no count is made in the second counter whilst a pulse is added to the first extended counter. Whilst the signal on lead 5 remains unchanged the alternating process of applying first two pulses to the first extended counter and one pulse to the second extended counter followed by one pulse to the first extended counter and then no pulse to the second extended counter is repeated. When the signal on lead 5 changes the process is reversed.
GB535972A
1971-02-05
1972-02-04
Digital/analog converters
Expired
GB1349210A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US11299471A
1971-02-05
1971-02-05
Publications (1)
Publication Number
Publication Date
GB1349210A
true
GB1349210A
(en)
1974-04-03
Family
ID=22346981
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB535972A
Expired
GB1349210A
(en)
1971-02-05
1972-02-04
Digital/analog converters
Country Status (10)
Country
Link
US
(1)
US3742487A
(en)
AU
(1)
AU458425B2
(en)
CA
(1)
CA964767A
(en)
CH
(1)
CH607457A5
(en)
DE
(1)
DE2205364C3
(en)
FR
(1)
FR2124627B1
(en)
GB
(1)
GB1349210A
(en)
IT
(1)
IT949018B
(en)
NO
(1)
NO136273C
(en)
SE
(1)
SE382291B
(en)
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3922671A
(en)
*
1974-06-17
1975-11-25
Inductosyn Corp
Position measurement system with provision for change of units of measurement
US4484178A
(en)
*
1982-06-22
1984-11-20
International Business Machines Corporation
Digital-to-analog converter
DE3243549C2
(en)
*
1982-11-25
1986-05-07
Dürkoppwerke GmbH, 4800 Bielefeld
Control device for the fully digitized speed control of a sewing machine or an automatic sewing machine
US4573902A
(en)
*
1983-06-24
1986-03-04
Interblock Partners, Ltd.
Machine for manufacturing foam building blocks
US5053769A
(en)
*
1990-02-12
1991-10-01
Borg-Warner Automotive, Inc.
Fast response digital interface apparatus and method
US4987389A
(en)
*
1990-04-02
1991-01-22
Borg-Warner Automotive, Inc.
Lockproof low level oscillator using digital components
US5077528A
(en)
*
1990-05-02
1991-12-31
Borg-Warner Automotive Electronic & Mechanical Systems Corporation
Transient free high speed coil activation circuit and method for determining inductance of an inductor system
US5619891A
(en)
*
1995-11-06
1997-04-15
Beere Precision Medical Instruments, Inc.
Ratcheting screwdriver
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3258667A
(en)
*
1966-06-28
Phase shift decoder for a servo control
US3175138A
(en)
*
1960-02-09
1965-03-23
Giddings & Lewis
Digital to analog decoder
US3571575A
(en)
*
1967-06-28
1971-03-23
Rank Organisation Ltd
Measurement devices
1971
1971-02-05
US
US00112994A
patent/US3742487A/en
not_active
Expired – Lifetime
1972
1972-02-04
GB
GB535972A
patent/GB1349210A/en
not_active
Expired
1972-02-04
NO
NO303/72A
patent/NO136273C/en
unknown
1972-02-04
DE
DE2205364A
patent/DE2205364C3/en
not_active
Expired
1972-02-04
SE
SE7201299A
patent/SE382291B/en
unknown
1972-02-05
IT
IT67354/72A
patent/IT949018B/en
active
1972-02-05
CH
CH175172A
patent/CH607457A5/xx
not_active
IP Right Cessation
1972-02-07
FR
FR7204771A
patent/FR2124627B1/fr
not_active
Expired
1972-02-07
CA
CA134,282A
patent/CA964767A/en
not_active
Expired
1972-02-07
AU
AU38749/72A
patent/AU458425B2/en
not_active
Expired
Also Published As
Publication number
Publication date
FR2124627A1
(en)
1972-09-22
CH607457A5
(en)
1978-12-29
NO136273B
(en)
1977-05-02
SE382291B
(en)
1976-01-19
DE2205364C3
(en)
1979-04-05
AU458425B2
(en)
1975-02-11
NO136273C
(en)
1977-08-10
US3742487A
(en)
1973-06-26
IT949018B
(en)
1973-06-11
AU3874972A
(en)
1973-08-09
CA964767A
(en)
1975-03-18
DE2205364B2
(en)
1978-08-03
DE2205364A1
(en)
1972-08-24
FR2124627B1
(en)
1974-12-13
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Legal Events
Date
Code
Title
Description
1974-08-14
PS
Patent sealed [section 19, patents act 1949]
1981-02-18
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1989-09-27
PCNP
Patent ceased through non-payment of renewal fee
