US1789350A - Radio receiving apparatus - Google Patents

Radio receiving apparatus Download PDF

Info

Publication number
US1789350A
US1789350A US196379A US19637927A US1789350A US 1789350 A US1789350 A US 1789350A US 196379 A US196379 A US 196379A US 19637927 A US19637927 A US 19637927A US 1789350 A US1789350 A US 1789350A
Authority
US
United States
Prior art keywords
circuit
receiving apparatus
radio
radio receiving
tuned
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
US196379A
Other languages
English (en)
Inventor
Bellini Ettore
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Application granted granted Critical
Publication of US1789350A publication Critical patent/US1789350A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H04B1/16—Circuits
    • H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for

Definitions

  • This invention relates to improved receiving and transmitting systems and more particularly to such systems wherein means is provided for eliminating atmospherics or strays.
  • the present invention has for one of its objects the elimination or substantial reduction of these two kinds of stray action.
  • the receiver apparatus comprising a radio frequency amplifier (amplification before detection), consists essentially in disposing between two grids or between two plates, or
  • a stopper circuit which is to be tuned to the wave-length to be received.
  • This circuit is thus equivalent to a break or to a very high impedance for the wave to be received, and this allows the amplifier to continue operating. And it also is equivalent tea more or less complete or dead shortcircuit for all of the other waves which will be neither amplified nor received.
  • Figure 1 shows the stopper circuit a inserted between the grids of the second and third stage.
  • Figure 2 shows the stopper circuit taken oil 7 between the plates of the first and the third tube.
  • Figure 3 shows the stopper circuit connected between the plate of the detector tube and the grid of the second tube.
  • A is a blocking condenser of 49 high capacity which serves to maintain the mean potentials of the plate and the grid at the desired'values.
  • the stopper circuit should not be connected directly with the grid, but rather ahead of the shunted condenser, in a manner indicated at m in Figure 1.
  • Circuit arrangements of this kind may be adopted in transmitter stations for the objeet of suppressing noises of all sorts liable to be superposed upon the radiations from the station.
  • a circuit arrangement for eliminating atmospherics or strays comprising a plurality of vacuum tube amplifiers, and a tuned parallel resonant circuit tuned to the received wave connected between two electrodes other than cathodes, each of said electrodes being associated with a difierent amplifier.
  • a circuit arrangement for eliminating atmospherics or strays comprising a plurality of stages of radio frequency amplification, and a tuned parallel resonant circuit tuned to the received wave connected between two elements, each associated with a different stage.
  • a circuit arrangement for eliminating atmospherics or strays comprising a plurality of stages of radio frequency amplification, and a tuned parallel resonant circuit tuned to the received wave connected between the grids of two stages.
  • a circuit arrangement for eliminating atmospherics or strays comprising a plurality of stages of amplification, and a rejector circuit tuned to received signal Waves connected between similar electrodes of successive stages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Microwave Amplifiers (AREA)
US196379A 1926-06-04 1927-06-03 Radio receiving apparatus Expired - Lifetime US1789350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1789350X 1926-06-04

Publications (1)

Publication Number Publication Date
US1789350A true US1789350A (en) 1931-01-20

Family

ID=9681094

Family Applications (1)

Application Number Title Priority Date Filing Date
US196379A Expired - Lifetime US1789350A (en) 1926-06-04 1927-06-03 Radio receiving apparatus

Country Status (2)

Country Link
US (1) US1789350A (enrdf_load_stackoverflow)
BE (1) BE342419A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE342419A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
GB547510A (en) Improvements in radio-relay systems
US1789350A (en) Radio receiving apparatus
US2410736A (en) Pulse-modulated wave-signal receiver
US1712026A (en) Radio signaling apparatus
GB619760A (en) Improvements relating to panoramic radio receivers
US2124211A (en) Combined amplification and tuning controls
US2066940A (en) Radio receiving system
US1997012A (en) Heterodyne circuits
US2140115A (en) Superheterodyne receiver
US1703079A (en) Superheterodyne radio system
US1857359A (en) Radio signaling
US1897735A (en) Multiple range radio receiving system
US2787703A (en) Receiver for two radio frequency bands
US1901117A (en) Receiving system
US2874356A (en) Method of and apparatus for seismic prospecting
GB1359635A (en) Panoramic receivers
US1905873A (en) Detector circuit for three-element gaseous discharge tubes
GB303608A (en) Wireless receiving circuits
US2038918A (en) Wireless receiver
US2044374A (en) Superheterodyne receiver for ultrashort waves
US2313911A (en) Selective system
US1508151A (en) Wireless signaling system
US1702067A (en) Radio receiving apparatus
US3029337A (en) Crystal controlled converter
US1755266A (en) Tuned radio frequency amplifier