GB623066A - Improvements in or relating to transmitter-receiver systems - Google Patents

Improvements in or relating to transmitter-receiver systems

Info

Publication number
GB623066A
GB623066A GB35197/46A GB3519746A GB623066A GB 623066 A GB623066 A GB 623066A GB 35197/46 A GB35197/46 A GB 35197/46A GB 3519746 A GB3519746 A GB 3519746A GB 623066 A GB623066 A GB 623066A
Authority
GB
United Kingdom
Prior art keywords
transmitter
potentiometer
coarse
frequency
control
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
GB35197/46A
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 Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB623066A publication Critical patent/GB623066A/en
Expired legal-status Critical Current

Links

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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)

Abstract

623,066. Transmitting-receiving systems. PHILIPS LAMPS, Ltd. Nov. 27, 1946, No. 35197. Convention date, June 16, 1943. [Class 40 (v)] In a transmitter-receiver, a coarse-tuning control for the transmitter is provided, together with a vernier-control means comprising a gridcontrolled reactance tube, the grid bias of which is controlled by means of a potentiometer, the voltage across which is dependent upon the setting of the coarse-tuning means. The Figure shows a transmitter - receiver arrangement in which frequency-determining stage 1 controls transmitter 2. The frequencydetermining circuit 1 comprises a tuned circuit with coarse tuning control means for varying the inductance or capacity, or both. The coarse tuning means is mechanically coupled to a potentiometer 12, to supply a voltage to potentiometer 9 which varies as the setting of the coarse tuning control. A voltage from potentiometer 9 is applied as grid bias to a thermionic reactance 8 to provide a vernier control of frequency-determining circuit 1. The arrangement is such that approximately the same change of absolute frequency may be achieved by potentiometer 9, whatever the setting of the coarse tuning means. Potentiometer 9 may be used for remote control, and the arrangement is used for the purpose of varying the transmitter frequency to agree with that of a distant transmitter.
GB35197/46A 1943-06-16 1946-11-27 Improvements in or relating to transmitter-receiver systems Expired GB623066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL623066X 1943-06-16

Publications (1)

Publication Number Publication Date
GB623066A true GB623066A (en) 1949-05-11

Family

ID=19788485

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35197/46A Expired GB623066A (en) 1943-06-16 1946-11-27 Improvements in or relating to transmitter-receiver systems

Country Status (1)

Country Link
GB (1) GB623066A (en)

Similar Documents

Publication Publication Date Title
GB636472A (en) Improvements in or relating to phase modulation transmission systems
GB677963A (en) Improvements in or relating to devices comprising an automatically frequency-corrected oscillator
GB640919A (en) Oscillation generator
GB523648A (en) Improvements in or relating to electrical oscillation generators
GB623066A (en) Improvements in or relating to transmitter-receiver systems
GB541006A (en) Television synchronizing and control system
GB607798A (en) Improvements in or relating to frequency-control circuits
GB633419A (en) Improvements in or relating to circuits for equalizing the frequencies of two electrical oscillations
GB617647A (en) Improvements in or relating to frequency-changing circuits
GB676238A (en) Improvements relating to phase-control circuits
GB658837A (en) Improvements in or relating to circuits for automatic frequency-correction
GB1292560A (en) Controllable reactance circuit
US2128837A (en) Oscillator
US2629864A (en) Receiver tuning device
GB1030476A (en) Improvements in or relating to electric automatic frequency control systems
GB646013A (en) Improvements in or relating to high frequency electric heating systems
GB640264A (en) Arrangement for simulating a reactive impedance
US2379325A (en) Frequency modulation
GB664014A (en) Stabilization of frequency modulated oscillators
GB628641A (en) Frequency modulation system
GB670238A (en) Improvements in or relating to automatic frequency control circuit arrangements
GB627407A (en) Improvements in or relating to transceivers
GB662133A (en) Improvements in or relating to electric control systems
GB628775A (en) Improvements in or relating to the supply and control of current to electric lamps
US2681413A (en) Frequency control system for magnetron oscillators