US1997397A - Combined detector amplifier circuits - Google Patents

Combined detector amplifier circuits Download PDF

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Publication number
US1997397A
US1997397A US701474A US70147433A US1997397A US 1997397 A US1997397 A US 1997397A US 701474 A US701474 A US 701474A US 70147433 A US70147433 A US 70147433A US 1997397 A US1997397 A US 1997397A
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US
United States
Prior art keywords
condenser
capacity
cathode
rectifier
amplifier
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
US701474A
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English (en)
Inventor
Adrianus Johannes Heins Va Ven
Mark Jan Van Der
Tellegen Bernardus Do Hubertus
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
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US1997397A publication Critical patent/US1997397A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/08—Demodulation of amplitude-modulated oscillations by means of non-linear two-pole elements
    • H03D1/10—Demodulation of amplitude-modulated oscillations by means of non-linear two-pole elements of diodes

Definitions

  • This invention relatesto a coupling arrangement for rectifying high frequency oscillations with subsequent amplification and more particular ly'to a combined detector arfipli ffer arrange merit.
  • the inven tic inisparti "'6 this condenser beingiconnected, without the in terposition of high frequency resistances; to the electrode of the rectifier hayin'grfa con'stant poten'tial sand the other lp'ole being connected to the controlling'grid of the amplifier.
  • the present invention provides means for avoiding that high frequency voltages are set up at the grid of the amplifier placed behind This is achieved by inserting in' the detector. the arrangement set out a capacity. between the grid of the amplifying tube and the electrode of the rectifier which electrode has no constant potential, said capacity having such a size that the capacities C1, C2, C3 and Cr form a balanced bridge, C1 denoting the capacity of the condenser capacity through which this condenser is connected to the controlling grid of the amplifying tube, C3 the capacity'placed between the grid of the amplifying tube and the electrode of the rectifier which has no constant potential, and C4 designating the capacity of the rectifier.
  • cathode 2 denotes a united detector and amplifying tube comprising a cathode 2.
  • the sand of the :condenser 8 which is-not 'connected to the cathode is. connected to the 'oontrolling grid of the amplifying tube through a It is imperative that no high frequency oscillacondenser ID.
  • a negative grid voltage canbe supplied to the controlling grid of the amplify ing tube through the resistance l I which is connected to a point having a negative potential with respect to the cathode.
  • the capacity of the rectifier may be denoted by the condenser l2 which is indicated in dotted lines on the drawing.
  • the tube used in this arrangement is equippedwith an equi-potential cathode which slightly projects from the electrode system of the amplifier'and is surrounded at this point with a small auxiliary anode which serves as anode of the rectifier system.
  • the capacityCr has circuit arrangement for the diode rectifier com prising a connection between the rectifier cold electrode and the cathode, said connection ineluding means for impressing high frequency signal currents on said circuit and a first condenser in series, a resistor shunted across said first condenser, an amplifier input circuit for said tube comprising a connection from a second cold electrode thereof to the cathode, said connection including a second condenser in series with the arrangement comprising the first condenser and shunted resistor'whe'reby the rectified voltage developed in the diode circuit is impressed upon: the amplifier input circuit, means including a third condenser'for connecting the second cold" electrode to the first
  • C2 denotes the capacity of the second condenser
  • an electronic tube provided with a cathode and a plurality of cold electrodes, said tube having its cathode and one of its cold electrodes disposed to serve as a'diode and the cathode and the other a r cold electrodes arranged so as to serve: as an uamplifier, external circuits for forming adiode rectifier circuit and an amplifier circuit, the'diode circuit comprising a connection including a first condenser between the diode cold electrode and the cathode, the amplifier being provided with an input circuit and an output circuit, said input circuit comprising a connection including a second condenser andthe first condenser in series between a second cold electrode and the cathode,
  • means for impressing a carrier wave signal upon said diode circuit means for impressing the recti- -fied voltage developed in the diode circuit upon balanced bridge circuit, the thirdicondenser hav ing a capacity value such that the total capacity between the diode coldelectrode and the second cold electrode is approximately equal to V r C1 7 I where C denotes the capacity, of the second con- "densen'C the-capacity of the first condenser and ADRIANUS JOI-IANNES b HEINS VAN DER VEN.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
US701474A 1932-12-02 1933-12-08 Combined detector amplifier circuits Expired - Lifetime US1997397A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997397X 1932-12-02

Publications (1)

Publication Number Publication Date
US1997397A true US1997397A (en) 1935-04-09

Family

ID=7935331

Family Applications (1)

Application Number Title Priority Date Filing Date
US701474A Expired - Lifetime US1997397A (en) 1932-12-02 1933-12-08 Combined detector amplifier circuits

Country Status (3)

Country Link
US (1) US1997397A (xx)
FR (1) FR763780A (xx)
NL (1) NL37612C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801358A (en) * 1951-12-28 1957-07-30 Bell Telephone Labor Inc Electron discharge devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801358A (en) * 1951-12-28 1957-07-30 Bell Telephone Labor Inc Electron discharge devices

Also Published As

Publication number Publication date
NL37612C (xx)
FR763780A (fr) 1934-05-07

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