GB1013452A – Transistor amplifier of variable gain
– Google Patents
GB1013452A – Transistor amplifier of variable gain
– Google Patents
Transistor amplifier of variable gain
Info
Publication number
GB1013452A
GB1013452A
GB4192/63A
GB419263A
GB1013452A
GB 1013452 A
GB1013452 A
GB 1013452A
GB 4192/63 A
GB4192/63 A
GB 4192/63A
GB 419263 A
GB419263 A
GB 419263A
GB 1013452 A
GB1013452 A
GB 1013452A
Authority
GB
United Kingdom
Prior art keywords
variable
bases
resistors
feb
transistors
Prior art date
1962-02-03
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
GB4192/63A
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.)
Philips GmbH
Original Assignee
Fernseh GmbH
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.)
1962-02-03
Filing date
1963-02-01
Publication date
1965-12-15
1963-02-01
Application filed by Fernseh GmbH
filed
Critical
Fernseh GmbH
1965-12-15
Publication of GB1013452A
publication
Critical
patent/GB1013452A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03G—CONTROL OF AMPLIFICATION
H03G1/00—Details of arrangements for controlling amplification
H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03F—AMPLIFIERS
H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
H03F3/42—Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03G—CONTROL OF AMPLIFICATION
H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
H03G3/02—Manually-operated control
H03G3/04—Manually-operated control in untuned amplifiers
H03G3/10—Manually-operated control in untuned amplifiers having semiconductor devices
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N5/00—Details of television systems
H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
H04N5/52—Automatic gain control
Abstract
1,013,452. Variable-gain transistor amplifiers. FERNSEH G.m.b.H. Feb. 1, 1963 [Feb. 3, 1962], No. 4192/63. Heading H3T. A variable-gain transistor amplifier comprises two transistors of opposite conductivity types having their collectors connected directly together and to an output terminal and having their emitters connected by respective resistors to the opposite poles of a D.C. source, together with means for applying a signal to be amplified in parallel to the bases of the transistors by means permitting the bases to be maintained at different D.C. voltages, a circuit of variable D.C. resistance being connected between the emitters. In Fig. 1, the emitter resistors 10, 11 are decoupled by capacitors 12, 13 and the bases are fed from a potentiometer chain 6, 7, 8. The resistive network 14, 15 may be replaced by a transistor of either conductivity type with series resistors (Figs. 2-6, not shown), and may be directly or capacitatively coupled to a grounded-base amplifier (Figs. 7-9, not shown). Two such circuits can be used for cross-fading of video signals.
GB4192/63A
1962-02-03
1963-02-01
Transistor amplifier of variable gain
Expired
GB1013452A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DEF35908A
DE1136376B
(en)
1962-02-03
1962-02-03
Circuit arrangement for changing the gain of a transistor stage
Publications (1)
Publication Number
Publication Date
GB1013452A
true
GB1013452A
(en)
1965-12-15
Family
ID=7096216
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4192/63A
Expired
GB1013452A
(en)
1962-02-03
1963-02-01
Transistor amplifier of variable gain
Country Status (4)
Country
Link
US
(1)
US3231827A
(en)
DE
(1)
DE1136376B
(en)
GB
(1)
GB1013452A
(en)
NL
(1)
NL288461A
(en)
Families Citing this family (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3305733A
(en)
*
1963-07-01
1967-02-21
Sperry Rand Corp
Complementary symmetry differential pulse integrator
US3327237A
(en)
*
1963-07-08
1967-06-20
Honeywell Inc
Current drive type transistorized servo-amplifier device
US3399277A
(en)
*
1965-05-14
1968-08-27
Radio Radio Corp Of America
Signal translating circuit
US3440538A
(en)
*
1965-10-29
1969-04-22
Hewlett Packard Co
Push-pull meter circuit for producing direct-current and alternating-current outputs proportional to applied alternating signal
US3400335A
(en)
*
1966-12-02
1968-09-03
Automatic Elect Lab
Integratable gyrator using mos and bipolar transistors
DE102005017538B4
(en)
*
2005-04-15
2010-10-07
Austriamicrosystems Ag
Arrangement and method for temperature compensation of a resistor
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2544211A
(en)
*
1949-05-18
1951-03-06
Rca Corp
Variable impedance device
US2802069A
(en)
*
1954-09-07
1957-08-06
Bell Telephone Labor Inc
Amplifier with high frequency compensation
US2955257A
(en)
*
1956-07-25
1960-10-04
Rca Corp
Transistor class b signal amplifier circuit
US3032704A
(en)
*
1958-06-17
1962-05-01
Ibm
Variable impedance network for automatic gain control circuit
US3002090A
(en)
*
1958-08-27
1961-09-26
Hazeltine Research Inc
Automatic-gain-control system
SU135108A1
(en)
*
1960-05-28
1960-11-30
Е.Н. Исаков
Isakov’s operational amplifier
0
NL
NL288461D
patent/NL288461A/xx
unknown
1962
1962-02-03
DE
DEF35908A
patent/DE1136376B/en
active
Pending
1963
1963-01-22
US
US253115A
patent/US3231827A/en
not_active
Expired – Lifetime
1963-02-01
GB
GB4192/63A
patent/GB1013452A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE1136376B
(en)
1962-09-13
US3231827A
(en)
1966-01-25
NL288461A
(en)
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