GB1128458A – Variable gain equalizing networks
– Google Patents
GB1128458A – Variable gain equalizing networks
– Google Patents
Variable gain equalizing networks
Info
Publication number
GB1128458A
GB1128458A
GB51614/65A
GB5161465A
GB1128458A
GB 1128458 A
GB1128458 A
GB 1128458A
GB 51614/65 A
GB51614/65 A
GB 51614/65A
GB 5161465 A
GB5161465 A
GB 5161465A
GB 1128458 A
GB1128458 A
GB 1128458A
Authority
GB
United Kingdom
Prior art keywords
network
stage
arms
potentiometer
bridge
Prior art date
1964-12-07
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
GB51614/65A
Inventor
Joseph John Friend
Walter Ralph Lundry
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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.)
1964-12-07
Filing date
1965-12-06
Publication date
1968-09-25
1965-12-06
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc
1968-09-25
Publication of GB1128458A
publication
Critical
patent/GB1128458A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04B—TRANSMISSION
H04B3/00—Line transmission systems
H04B3/02—Details
H04B3/04—Control of transmission; Equalising
H04B3/14—Control of transmission; Equalising characterised by the equalising network used
H04B3/141—Control of transmission; Equalising characterised by the equalising network used using multiequalisers, e.g. bump, cosine, Bode
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04B—TRANSMISSION
H04B3/00—Line transmission systems
H04B3/02—Details
H04B3/04—Control of transmission; Equalising
Abstract
1,128,458. Transistor amplifying circuits; equalizer networks. WESTERN ELECTRIC CO. Inc. 6 Dec., 1965 [7 Dec., 1964], No. 51614/65. Headings H3T and H3U. An adjustable attenuation equalizer network comprises a one-port bridge network, e.g. N1, consisting of two arms Rc, Rd, including a potentiometer Rd, a further two arms Ra, Rb in parallel with the firstmentioned two arms, and a reactive connection, i.e. capacitor C 1 , from the tapping point of the potentiometer to the junction between the further two arms Ra, Rb. The bridge is such as to have a substantially constant D.C. impedance and an impedancefrequency characteristic including a break point, the A.C. impedance being adjustable by means of the potentiometer without substantially altering the frequency at which the break point occurs. While the bridging element has been shown as a capacitor C 1 , a network comprising resistance, capacitance and inductance may be utilized instead. A variable gain attenuation equalizer comprises a two-stage amplifier, e.g. stages A 1 , A 1
GB51614/65A
1964-12-07
1965-12-06
Variable gain equalizing networks
Expired
GB1128458A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US416365A
US3383616A
(en)
1964-12-07
1964-12-07
Feedback amplifier with adjustable equalization
Publications (1)
Publication Number
Publication Date
GB1128458A
true
GB1128458A
(en)
1968-09-25
Family
ID=23649677
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB51614/65A
Expired
GB1128458A
(en)
1964-12-07
1965-12-06
Variable gain equalizing networks
Country Status (6)
Country
Link
US
(1)
US3383616A
(en)
BE
(1)
BE673330A
(en)
DE
(1)
DE1280950B
(en)
FR
(1)
FR1468992A
(en)
GB
(1)
GB1128458A
(en)
NL
(1)
NL161945C
(en)
Families Citing this family (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE1512673B2
(en)
*
1967-03-09
1970-10-01
Brown, Boveri & Cie Ag, 6800 Mannheim
Multi-stage amplifier with a negative feedback loop over all stages and additional negative feedback in several stages
US3663898A
(en)
*
1969-12-17
1972-05-16
Bell Telephone Labor Inc
Equalizer
US3883830A
(en)
*
1974-05-13
1975-05-13
Hekimian Laboratories Inc
Line conditioner with independent gain and delay control
US4273963A
(en)
*
1979-05-25
1981-06-16
Bell Telephone Laboratories, Incorporated
Automatic equalization for digital transmission systems
US5280346A
(en)
*
1992-10-23
1994-01-18
Ross John D
Equalizing amplifier
US5642079A
(en)
*
1995-09-29
1997-06-24
Dallas Semiconductor Corporation
Amplifier with pole/zero compensation
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE828717C
(en)
*
1949-05-19
1952-02-21
Mix & Genest A G
Equalizer for the residual damping compensation in carrier current systems
US2658958A
(en)
*
1949-07-16
1953-11-10
Wilcox Gay Corp
Negative feedback frequency response compensation amplifier system
US3231659A
(en)
*
1960-04-06
1966-01-25
Nihon Gakki Seizo Kabushiki Ka
Volume control device for electric musical instruments
1964
1964-12-07
US
US416365A
patent/US3383616A/en
not_active
Expired – Lifetime
1965
1965-11-13
DE
DEW40302A
patent/DE1280950B/en
active
Pending
1965-12-06
GB
GB51614/65A
patent/GB1128458A/en
not_active
Expired
1965-12-06
BE
BE673330A
patent/BE673330A/xx
not_active
IP Right Cessation
1965-12-07
NL
NL6515886.A
patent/NL161945C/en
not_active
IP Right Cessation
1965-12-07
FR
FR41210A
patent/FR1468992A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE1280950B
(en)
1968-10-24
NL161945C
(en)
1980-03-17
FR1468992A
(en)
1967-02-10
BE673330A
(en)
1966-04-01
NL6515886A
(en)
1966-06-08
US3383616A
(en)
1968-05-14
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None