GB1447869A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1447869A – Circuit arrangement for a television or radio receiver for switching a tuning voltage from a preset tuning potentiometer to a voltage controllable tuning element at will
– Google Patents
Circuit arrangement for a television or radio receiver for switching a tuning voltage from a preset tuning potentiometer to a voltage controllable tuning element at will

Info

Publication number
GB1447869A

GB1447869A
GB4192273A
GB4192273A
GB1447869A
GB 1447869 A
GB1447869 A
GB 1447869A
GB 4192273 A
GB4192273 A
GB 4192273A
GB 4192273 A
GB4192273 A
GB 4192273A
GB 1447869 A
GB1447869 A
GB 1447869A
Authority
GB
United Kingdom
Prior art keywords
tuning
voltage
current mirror
output
transistor
Prior art date
1972-09-09
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
GB4192273A
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 Electronics UK Ltd

Original Assignee
Philips Electronic and Associated Industries 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.)
1972-09-09
Filing date
1973-09-06
Publication date
1976-09-02

1972-09-09
Priority claimed from DE19722244283
external-priority
patent/DE2244283C3/en

1973-05-25
Priority claimed from DE19732326655
external-priority
patent/DE2326655C3/en

1973-09-06
Application filed by Philips Electronic and Associated Industries Ltd
filed
Critical
Philips Electronic and Associated Industries Ltd

1976-09-02
Publication of GB1447869A
publication
Critical
patent/GB1447869A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H03—ELECTRONIC CIRCUITRY

H03K—PULSE TECHNIQUE

H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking

H03K17/14—Modifications for compensating variations of physical values, e.g. of temperature

H—ELECTRICITY

H03—ELECTRONIC CIRCUITRY

H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS

H03J3/00—Continuous tuning

H03J3/02—Details

H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability

H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance

H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

H—ELECTRICITY

H03—ELECTRONIC CIRCUITRY

H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS

H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner

H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings

H03J5/0218—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, by selecting the corresponding analogue value between a set of preset values

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

H03K17/603—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 with coupled emitters

Abstract

1447869 Receiver tuning arrangements; transistor analogue gates and current mirror circuits PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 6 Sept 1973 [9 Sept 1972 25 May 1973] 41922/73 Headings H3Q and H3T In a circuit arrangement for a TV or radio receiver for switching a tuning voltage of a tuning potentiometer 1, Fig. 1, to a voltage controllable tuning element 3 by means of an impedance converter T 1 , T 2 , T 6 Fig. 2 and a switch T 7 , T 8 identical switching elements T 7 , T 8 interconnect the tuning potentiometer 1 to the tuning element 3 when activated by a switchable current source T 9 , T 10 and the arrangement is such that current flowing across a junction of one T 7 of the switching elements is matched by an equal current flowing in a corresponding sense across the corresponding junction of the other switching element T 8 . As shown in Fig. 2 an emitter follower T 6 provides the impedance conversion while a difference amplifier T 1 , T 2 and current mirror T 3 , T 4 , T 5 provide for U BE and temperature compensation. The tuning voltage at 8 is prevented from occurring at the output A when T 9 is turned on by control at 12 so as to turn off the analogue switch T 7 , T 8 . In a modification Fig. 3, the analogue switch transistors T 20 , T 21 are switched off when a transistor T 25 is turned on. A transistor T 24 provides negative feedback to T 21 so as to make the collector currents of T 23 and T 21 equally large. The current mirror transistors T 22 and T 23 may have a high current amplification # of 98 and operate the same as the current mirror of Fig. 2 which has three transistors T 3 , T 4 , T 5 because (lateral) PNP transistors only have low # such as 2-15. The current generator T 12 , T 26 is common for all electronic analogue switches such as 2, 5 Fig. 1, and is necessary to recharge the hum and interference filter capacitor connected to the output in a period after switch over of tuning. In a modification of Fig. 3 an output amplifier (T 24 , T 42 , Fig. 4, not shown) replaces the emitter follower T 24 of Fig. 3. This output amplifier is common for all programmes and includes a plural collector transistor (T 42 ) constituting a current mirror. The tuning voltage may be indicated by a voltmeter (50) connected to the output A. In a further arrangement (Fig. 5, not shown) a plurality of impedance converting analogue switches each consist of transistor pairs T 1 a, T 2 a, T 1 b, T 2 b having their outputs connected to a common output emitter follower T 6 and also connected to a common current mirror T 3 , T 4 , T 5 . The circuit arrangement may be constructed in integrated circuit form.

GB4192273A
1972-09-09
1973-09-06
Circuit arrangement for a television or radio receiver for switching a tuning voltage from a preset tuning potentiometer to a voltage controllable tuning element at will

Expired

GB1447869A
(en)

Applications Claiming Priority (2)

Application Number
Priority Date
Filing Date
Title

DE19722244283

DE2244283C3
(en)

1972-09-09
1972-09-09

Circuit arrangement Me a television or radio receiver for switching through the tuning voltage

DE19732326655

DE2326655C3
(en)

1973-05-25
1973-05-25

Circuit arrangement for a television or radio receiver for switching through the tuning voltage

Publications (1)

Publication Number
Publication Date

GB1447869A
true

GB1447869A
(en)

1976-09-02

Family
ID=25763812
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB4192273A
Expired

GB1447869A
(en)

1972-09-09
1973-09-06
Circuit arrangement for a television or radio receiver for switching a tuning voltage from a preset tuning potentiometer to a voltage controllable tuning element at will

Country Status (6)

Country
Link

JP
(1)

JPS5738048B2
(en)

AT
(1)

AT336708B
(en)

FR
(1)

FR2204078B1
(en)

GB
(1)

GB1447869A
(en)

IT
(1)

IT996660B
(en)

NL
(1)

NL161939C
(en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

JPS5199967A
(en)

1975-02-28
1976-09-03
Mitsubishi Electric Corp

ANAROGUDENATSUSENTAKUKAIRO

JPS52150952U
(en)

1976-05-13
1977-11-16

NL186789C
(en)

1979-02-16
1991-02-18
Philips Nv

SWITCHING CIRCUIT FITTED WITH MULTIPLE INPUT CHANNELS AND AN OUTPUT CHANNEL.

Family Cites Families (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

JPS4328598Y1
(en)

1964-09-03
1968-11-25

1973

1973-08-31
NL
NL7311991A
patent/NL161939C/en
not_active
IP Right Cessation

1973-09-06
GB
GB4192273A
patent/GB1447869A/en
not_active
Expired

1973-09-06
AT
AT774473A
patent/AT336708B/en
not_active
IP Right Cessation

1973-09-06
IT
IT6966373A
patent/IT996660B/en
active

1973-09-07
JP
JP10038473A
patent/JPS5738048B2/ja
not_active
Expired

1973-09-10
FR
FR7332482A
patent/FR2204078B1/fr
not_active
Expired

Also Published As

Publication number
Publication date

NL161939C
(en)

1980-03-17

AT336708B
(en)

1977-05-25

NL7311991A
(en)

1974-03-12

FR2204078B1
(en)

1976-05-14

JPS4992904A
(en)

1974-09-04

ATA774473A
(en)

1976-09-15

FR2204078A1
(en)

1974-05-17

NL161939B
(en)

1979-10-15

IT996660B
(en)

1975-12-10

JPS5738048B2
(en)

1982-08-13

Información de contacto