GB344076A - Improvements in or relating to thermionic valve amplifying systems - Google Patents

Improvements in or relating to thermionic valve amplifying systems

Info

Publication number
GB344076A
GB344076A GB37313/29A GB3731329A GB344076A GB 344076 A GB344076 A GB 344076A GB 37313/29 A GB37313/29 A GB 37313/29A GB 3731329 A GB3731329 A GB 3731329A GB 344076 A GB344076 A GB 344076A
Authority
GB
United Kingdom
Prior art keywords
grid
valve
circuits
screening
output
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
GB37313/29A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB344076A publication Critical patent/GB344076A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1018—Means associated with receiver for limiting or suppressing noise or interference noise filters connected between the power supply and the receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Fencing (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

344,076. Valve amplifying and detecting circuits. STANDARD TELEPHONES & CABLES, Ltd., Columbia House, Aldwych, London.- (Assignees of Heising, R. A. ; 2, Duncan Street, Millburn, New Jersey, U.S.A.) Dec. 5, 1929, No. 37313. Convention date, Jan 2. [Classes 39 (i) and 40 (v).] A screen-grid valve with its associated input and output circuits is so arranged and connected that there is substantially no coupling between these circuits due to parts being common to both circuits and entirely separate paths are provided for the charging currents for the capacity constituted by the screening grid and the anode. Similar arrangements may be made for the screen-grid to control grid capacity and one lead to the screening grid may be taken through one wall of the valve and another lead to the screening grid be taken through the opposite wall. The input and output circuits are arranged in separate compartments in a screening box with the valve projecting through an aperture (Fig. 4, not shown). High-frequency chokes are provided in all supply leads. A similar arrangement for the valve used as a detector is employed and in the output a low-pass filter is provided. Fig. 2 shows an arrangement in which coupling due to the charging current to the capacities formed by the screening grid and the grid and anode respectively is eliminated. Fig. 3 shows an arrangement in which, in addition, the coupling due to a lead to the filament common to the input and output is obviated. The invention is particularly applicable to short-wave signalling.
GB37313/29A 1929-01-02 1929-12-05 Improvements in or relating to thermionic valve amplifying systems Expired GB344076A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US329881A US1788521A (en) 1929-01-02 1929-01-02 Short-wave amplifying system

Publications (1)

Publication Number Publication Date
GB344076A true GB344076A (en) 1931-03-05

Family

ID=23287418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37313/29A Expired GB344076A (en) 1929-01-02 1929-12-05 Improvements in or relating to thermionic valve amplifying systems

Country Status (3)

Country Link
US (1) US1788521A (en)
GB (1) GB344076A (en)
NL (1) NL28535C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767483C (en) * 1937-04-29 1952-08-28 Siemens & Halske A G High frequency amplification system
DE755332C (en) * 1937-09-03 1954-03-01 Telefunken Gmbh Device for the trouble-free operation of pipes with braking grids in short wave circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767483C (en) * 1937-04-29 1952-08-28 Siemens & Halske A G High frequency amplification system
DE755332C (en) * 1937-09-03 1954-03-01 Telefunken Gmbh Device for the trouble-free operation of pipes with braking grids in short wave circuits

Also Published As

Publication number Publication date
NL28535C (en)
US1788521A (en) 1931-01-13

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