GB1263357A - Linear frequency modulator - Google Patents

Linear frequency modulator

Info

Publication number
GB1263357A
GB1263357A GB3506769A GB3506769A GB1263357A GB 1263357 A GB1263357 A GB 1263357A GB 3506769 A GB3506769 A GB 3506769A GB 3506769 A GB3506769 A GB 3506769A GB 1263357 A GB1263357 A GB 1263357A
Authority
GB
United Kingdom
Prior art keywords
frequency
oscillator
output
fed
discriminator
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
GB3506769A
Inventor
Harold Baker Wood
Derek Raymond Hill
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
Priority to GB3506769A priority Critical patent/GB1263357A/en
Priority to DE19702033649 priority patent/DE2033649A1/en
Priority to FR7025454A priority patent/FR2051688B1/fr
Priority to BE753349D priority patent/BE753349A/en
Publication of GB1263357A publication Critical patent/GB1263357A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Superheterodyne Receivers (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1,263,357. Frequency modulation. STANDARD TELEPHONES & CABLES Ltd. 11 July, 1969, No. 35067/69. Heading H3R. A linear frequency modulating arrangement for a UHF oscillator 1 comprises: means CR1 for applying a modulation signal, e.g. a sawtooth, to the oscillator 1; means 3 for sampling the oscillator output; means 6 for heterodyning the sample frequency to obtain a lower frequency ; a frequency divider 8; a linear discriminator 9; and means R1, R2 for combining the discriminator output with the modulating signal. As described, the means for heterodyning includes a mixer 6 which is fed with a signal derived from a VHF oscillator 4 via a multiplier 5 which multiplies the VHF frequency to a UHF frequency less than the lowest frequency of oscillator 1. The output from the mixer is then fed to flip-flop type divider 8 which produces a squarewave output which is fed to a CR network discriminator 9.
GB3506769A 1969-07-11 1969-07-11 Linear frequency modulator Expired GB1263357A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3506769A GB1263357A (en) 1969-07-11 1969-07-11 Linear frequency modulator
DE19702033649 DE2033649A1 (en) 1969-07-11 1970-07-07 Circuit arrangement for linear frequency modulation of a UHF oscillator for FM CW altimeter transmitters \ nm Internationa! Standard Electric Corp, New York, NY (V St A)
FR7025454A FR2051688B1 (en) 1969-07-11 1970-07-09
BE753349D BE753349A (en) 1969-07-11 1970-07-13 LINEAR FREQUENCY MODULATOR, (INV: H.B. WOOD AND

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3506769A GB1263357A (en) 1969-07-11 1969-07-11 Linear frequency modulator

Publications (1)

Publication Number Publication Date
GB1263357A true GB1263357A (en) 1972-02-09

Family

ID=10373407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3506769A Expired GB1263357A (en) 1969-07-11 1969-07-11 Linear frequency modulator

Country Status (4)

Country Link
BE (1) BE753349A (en)
DE (1) DE2033649A1 (en)
FR (1) FR2051688B1 (en)
GB (1) GB1263357A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7905255A (en) * 1979-07-05 1981-01-07 Plessey Handel Investment Ag FREQUENCY MODULATOR.
DE19713967A1 (en) * 1997-04-04 1998-10-08 Siemens Ag Distance measurement device using FMCW radar

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414842A (en) * 1965-10-21 1968-12-03 Collins Radio Co Frequency modulated reference controlled oscillator

Also Published As

Publication number Publication date
FR2051688A1 (en) 1971-04-09
DE2033649A1 (en) 1971-01-21
FR2051688B1 (en) 1975-01-10
BE753349A (en) 1971-01-13

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