US2144355A - Superheterodyne receiver - Google Patents

Superheterodyne receiver Download PDF

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Publication number
US2144355A
US2144355A US97355A US9735536A US2144355A US 2144355 A US2144355 A US 2144355A US 97355 A US97355 A US 97355A US 9735536 A US9735536 A US 9735536A US 2144355 A US2144355 A US 2144355A
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US
United States
Prior art keywords
frequency
circuit
grid
anode
receiver
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 - Lifetime
Application number
US97355A
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English (en)
Inventor
Witts Alfred Thomas
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.)
RCA Corp
Original Assignee
RCA Corp
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Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US2144355A publication Critical patent/US2144355A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies

Definitions

  • the rejector circuit or device is a tuned circuit gang controlled with the high fre-' quency and local oscillator tuned circuits of the quency circuit.
  • a superheterodyne receiver has a so-called" triode-pentode valve I which is used both as a local oscillator and as a frequency changer; Incoming signals are applied to the innermost grid GI of the pentode portion of the valve, this grid circuit containing the usual radio frequency parallel tuned circuit Ll Cl, the condenser Cl being, of course, a variable condenser for tuning purposes.
  • Bias for example automatically Varied bias for automatic gain control purposes, is applied in any convenient manner well known per se to this innermost grid. As shown automatic gain control bias is applied via lead A. V. C.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
US97355A 1935-09-21 1936-08-22 Superheterodyne receiver Expired - Lifetime US2144355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26232/35A GB463070A (en) 1935-09-21 1935-09-21 Improvements in or relating to superheterodyne receivers

Publications (1)

Publication Number Publication Date
US2144355A true US2144355A (en) 1939-01-17

Family

ID=10240406

Family Applications (1)

Application Number Title Priority Date Filing Date
US97355A Expired - Lifetime US2144355A (en) 1935-09-21 1936-08-22 Superheterodyne receiver

Country Status (3)

Country Link
US (1) US2144355A (fr)
FR (1) FR810657A (fr)
GB (1) GB463070A (fr)

Also Published As

Publication number Publication date
GB463070A (en) 1937-03-22
FR810657A (fr) 1937-03-26

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