GB816664A - Improvements in or relating to amplifying circuits - Google Patents

Improvements in or relating to amplifying circuits

Info

Publication number
GB816664A
GB816664A GB34315/56A GB3431556A GB816664A GB 816664 A GB816664 A GB 816664A GB 34315/56 A GB34315/56 A GB 34315/56A GB 3431556 A GB3431556 A GB 3431556A GB 816664 A GB816664 A GB 816664A
Authority
GB
United Kingdom
Prior art keywords
valve
anode
amplifier
resistor
supply
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
GB34315/56A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB816664A publication Critical patent/GB816664A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F5/00—Amplifiers with both discharge tubes and semiconductor devices as amplifying elements

Landscapes

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

Abstract

816,664. Amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 9, 1956 [Nov. 14, 1955], No. 34315/56. Class 40 (6). The anode of an amplifier valve is connected to the positive terminal of supply through a transistor, the collector of the transistor being connected to the anode, the emitter through a resistance to the positive terminal of the supply and the base through a low resistance to the supply. The transistor acts as a low resistance for D.C., but a high impedance for A.C., the value of the latter being increased by the presence of the emitter resistor. In the circuit shown, the anode of the amplifier valve is connected to the grid of a cathode follower valve 12 which supplies the screen grid voltage for the amplifier valve through a decoupling circuit and negative feedback, through resistor 24, to the input of the amplifier. In an alternative circuit in which the negative feedback is omitted (Fig. 3, not shown), the screen grid voltage for the amplifier valve is obtained from a tap on the cathode resistor of valve 12 and the decoupling is effected by a capacitor connected across this resistor. In this embodiment the output is taken from the anode of valve 12.
GB34315/56A 1955-11-14 1956-11-09 Improvements in or relating to amplifying circuits Expired GB816664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL816664X 1955-11-14

Publications (1)

Publication Number Publication Date
GB816664A true GB816664A (en) 1959-07-15

Family

ID=19838906

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34315/56A Expired GB816664A (en) 1955-11-14 1956-11-09 Improvements in or relating to amplifying circuits

Country Status (3)

Country Link
DE (1) DE1065881B (en)
FR (1) FR1160237A (en)
GB (1) GB816664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361981A (en) * 1964-03-25 1968-01-02 Optimation Inc Ultra-linear d.c. amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361981A (en) * 1964-03-25 1968-01-02 Optimation Inc Ultra-linear d.c. amplifier

Also Published As

Publication number Publication date
DE1065881B (en) 1959-09-24
FR1160237A (en) 1958-07-09

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