GB1526916A - Emittercoupled transistor amplifier circuits - Google Patents

Emittercoupled transistor amplifier circuits

Info

Publication number
GB1526916A
GB1526916A GB2239177A GB2239177A GB1526916A GB 1526916 A GB1526916 A GB 1526916A GB 2239177 A GB2239177 A GB 2239177A GB 2239177 A GB2239177 A GB 2239177A GB 1526916 A GB1526916 A GB 1526916A
Authority
GB
United Kingdom
Prior art keywords
transistor
diodes
signal
voltage
transistors
Prior art date
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
GB2239177A
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.)
Siemens AG
Original Assignee
Siemens AG
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.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1526916A publication Critical patent/GB1526916A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/04—Roasting apparatus with movably-mounted food supports or with movable heating implements; Spits
    • A47J37/041—Roasting apparatus with movably-mounted food supports or with movable heating implements; Spits with food supports rotating about a horizontal axis
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
    • H03C1/542—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes
    • H03C1/545—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes using bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • 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
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Baking, Grill, Roasting (AREA)
  • Central Heating Systems (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplitude Modulation (AREA)

Abstract

1526916 Gain control; amplitude modulators SIEMENS AG 27 May 1977 [31 May 1976] 22391/77 Headings H3R H4R and H3G A variable gain emitter coupled circuit comprises two transistors with their emitters connected by respective D.C. paths to a reference voltage and through respective capacitors and separate series cascades of diodes to a controlled direct current source responsive to a control voltage, the junction point of the capacitors and their diode cascades being connected by a respective resistor to a reference voltage point. As described a doublebalanced modulator Fig. 1 in which the modulating signal U E is applied to the bases of transistors 21 and 22, which have their emitters coupled for A.C. by diodes 15-20. The D.C. through these diodes and hence their dynamic impedance is controlled by a transistor 30 receiving an AGC voltage derived from a pilot signal. Potential divider 35, 36 applies a mean control voltage to transistor 30 in the absence of a pilot signal. In another embodiment, Fig. 2 (not shown), an unbalanced modulating signal is applied to the base of transistor 21 through an adjustable capacitative voltages divider to provide manual gain control, the base of transistor 22 being A.C. earthed. In this case a choke or active equivalent is inserted betwen resistors 11 and 12 and -U B to prevent asymmetrical loss of signal.
GB2239177A 1976-05-31 1977-05-27 Emittercoupled transistor amplifier circuits Expired GB1526916A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19762624337 DE2624337C2 (en) 1976-05-31 1976-05-31 Double push-pull modulator with a push-pull amplifier
DE19762627310 DE2627310C2 (en) 1976-05-31 1976-06-18 Electrically heated folding grill

Publications (1)

Publication Number Publication Date
GB1526916A true GB1526916A (en) 1978-10-04

Family

ID=25770514

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2239177A Expired GB1526916A (en) 1976-05-31 1977-05-27 Emittercoupled transistor amplifier circuits
GB2450777A Expired GB1539668A (en) 1976-05-31 1977-06-13 Folding grill

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2450777A Expired GB1539668A (en) 1976-05-31 1977-06-13 Folding grill

Country Status (7)

Country Link
JP (1) JPS52146537A (en)
AT (1) AT349585B (en)
BE (2) BE855220A (en)
DE (2) DE2624337C2 (en)
FR (2) FR2353996A1 (en)
GB (2) GB1526916A (en)
NL (2) NL171531C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3109590A1 (en) * 1981-03-13 1982-09-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Regulated differential amplifier stage
GB2200003A (en) * 1986-12-31 1988-07-20 Sgs Microelettronica Spa A coupling circuit for use between a modulator and a ceramic filter in amplitude modulation receivers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153651A (en) * 1976-06-17 1977-12-20 Sony Corp Gain changing circuit
IT1211106B (en) * 1981-09-16 1989-09-29 Ates Componenti Elettron TRANSISTOR AMPLIFIER AND MIXER INPUT STAGE FOR A RADIO RECEIVER.
JP5935978B2 (en) * 2012-03-13 2016-06-15 旭化成エレクトロニクス株式会社 Pulse generation circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248704B (en) * 1967-08-31
FR1328792A (en) * 1962-07-13 1963-05-31 Oatley Technical Dev Electric rotisserie
CH477195A (en) * 1968-08-22 1969-08-31 Schneider & Co W Grill or roasting apparatus
DE1803655A1 (en) * 1968-10-17 1970-06-11 Siemens Ag Amplifier with two transistors and negative feedback
DE1930926C3 (en) * 1969-06-19 1974-01-24 Siemens Ag, 1000 Berlin U. 8000 Muenchen Regulated amplifier
FR2284299A1 (en) * 1974-09-11 1976-04-09 Burg Konrad Automatic fold-away rotary spit grilling appts - has connecting guide members ensuring correct positioning of parts on opening up

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3109590A1 (en) * 1981-03-13 1982-09-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Regulated differential amplifier stage
GB2200003A (en) * 1986-12-31 1988-07-20 Sgs Microelettronica Spa A coupling circuit for use between a modulator and a ceramic filter in amplitude modulation receivers

Also Published As

Publication number Publication date
ATA314877A (en) 1978-09-15
DE2627310C2 (en) 1978-06-01
DE2624337A1 (en) 1977-12-08
NL7705980A (en) 1977-12-02
NL171531C (en) 1983-04-18
DE2624337C2 (en) 1982-12-23
FR2354740A1 (en) 1978-01-13
BE855220A (en) 1977-11-30
AT349585B (en) 1979-04-10
FR2353996B1 (en) 1981-02-20
DE2627310B1 (en) 1977-10-13
NL171531B (en) 1982-11-16
BE855820A (en) 1977-10-17
NL7704406A (en) 1977-12-20
FR2353996A1 (en) 1977-12-30
AU2534377A (en) 1978-03-09
GB1539668A (en) 1979-01-31
JPS52146537A (en) 1977-12-06
FR2354740B1 (en) 1983-01-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCPE Delete 'patent ceased' from journal

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