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GB1329717A - Wide band amplifiers - Google Patents

Wide band amplifiers

Info

Publication number
GB1329717A
GB1329717A GB5020770A GB5020770A GB1329717A GB 1329717 A GB1329717 A GB 1329717A GB 5020770 A GB5020770 A GB 5020770A GB 5020770 A GB5020770 A GB 5020770A GB 1329717 A GB1329717 A GB 1329717A
Authority
GB
United Kingdom
Prior art keywords
collector
base
emitter
transistor
connection
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
GB5020770A
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.)
Filing date
Publication date
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1329717A publication Critical patent/GB1329717A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/083—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements in transistor amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1329717 Transistor wide band amplifiers PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 22 Oct 1970 [25 Oct 1969] 50207/70 Heading H3T In a wide band amplifier of the type in which the emitter-base path of a transistor T 2 is connected in the manner shown across the collector-base path of a transistor T 1 of complementary type, a further transistor T 3 has its collector connected to the connection between collector and emitter of T 1 and T 2 and its base connected to the collector of T 2 . The connection of T 2 to T 1 maintains the collectorto-emitter and thus collector-to base voltage of T 1 constant to reduce the effect of collectorbase capacitance, and T 3 allows a large offset between input and output voltages so that when (as shown) the amplifier is used in a differential circuit, large common mode variations can be accommodated. T 2 may be of lateral type and shunted by a small capacitor to comprise the high frequency performance, the effective value of the capacitor being increased by the Miller connection to T 3 . The two halves of the amplifier are provided with current sinks T 6 , T 6 <SP>1</SP> biased from a diode connected transistor T 7 and a capacitor C c provides a high frequency connection between T 3 and T 3 <SP>1</SP>, T 3 and T 4 form an amplifier having a gain proportional to the relative areas of the emitter-base diodes. The connection between the collector of T 2 and base of T 3 may include an emitter follower (T 5 , Fig. 2, not shown).
GB5020770A 1969-10-25 1970-10-22 Wide band amplifiers Expired GB1329717A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6916123A NL162801C (en) 1969-10-25 1969-10-25 AMPLIFIER.

Publications (1)

Publication Number Publication Date
GB1329717A true GB1329717A (en) 1973-09-12

Family

ID=19808216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5020770A Expired GB1329717A (en) 1969-10-25 1970-10-22 Wide band amplifiers

Country Status (7)

Country Link
JP (1) JPS5024824B1 (en)
CA (1) CA923571A (en)
ES (1) ES384849A1 (en)
FR (1) FR2066287A5 (en)
GB (1) GB1329717A (en)
NL (1) NL162801C (en)
SE (1) SE365675B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE30587E (en) 1978-10-25 1981-04-21 Rca Corporation Differential amplifier circuit

Also Published As

Publication number Publication date
DE2050881B2 (en) 1977-06-16
DE2050881A1 (en) 1971-05-06
NL162801B (en) 1980-01-15
ES384849A1 (en) 1973-03-16
JPS5024824B1 (en) 1975-08-19
FR2066287A5 (en) 1971-08-06
CA923571A (en) 1973-03-27
SE365675B (en) 1974-03-25
NL162801C (en) 1980-06-16
NL6916123A (en) 1971-04-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee