GB1025980A - Electronic phase shifting circuit - Google Patents

Electronic phase shifting circuit

Info

Publication number
GB1025980A
GB1025980A GB4019763A GB4019763A GB1025980A GB 1025980 A GB1025980 A GB 1025980A GB 4019763 A GB4019763 A GB 4019763A GB 4019763 A GB4019763 A GB 4019763A GB 1025980 A GB1025980 A GB 1025980A
Authority
GB
United Kingdom
Prior art keywords
frequency
phase
modulators
outputs
shifting circuit
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
GB4019763A
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
Publication of GB1025980A publication Critical patent/GB1025980A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1,025,980. Transistor frequency changing circuits. STANDARD TELEPHONES & CABLES Ltd. Oct. 11, 1963 [Oct. 11, 1962], No. 40197/63. Heading H3T. [Also in Division H2] In an arrangement in which a high frequency F is shifted a small amount f to give frequencies (F+f) or (F-f) a phase-shifting circuit 101 is used to derive from the frequency F an output of this frequency and two further outputs respectively shifted 120 and 240 degrees in phase. The three outputs are limited in amplitude by limiters 107-109 and each forms one input of modulators 103, 104, 105 respectively. The second inputs of the modulators are derived from a phase-shifting circuit 102A which produces from the frequency f an output of the same frequency and two further outputs respectively shifted 120 and 240 degrees in phase. The modulators 103-105 may be of the transistor choppertype and their outputs are fed to fillers 110- 112 which suppress components of frequency f and harmonics of frequency of the order 2F and higher. The outputs of the filters 110- 112 are combined in an adding network 106, it being shown in the Specification that the output on line 14 comprises only the desired sum or difference frequency, i.e. (F+f) or (F-f) according to the manner in which the phase-shifted signals are combined in the modulators 103-105.
GB4019763A 1962-10-11 1963-10-11 Electronic phase shifting circuit Expired GB1025980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR911909A FR1350673A (en) 1962-10-11 1962-10-11 Improvements to electronic phase shifting devices

Publications (1)

Publication Number Publication Date
GB1025980A true GB1025980A (en) 1966-04-14

Family

ID=8788474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4019763A Expired GB1025980A (en) 1962-10-11 1963-10-11 Electronic phase shifting circuit

Country Status (2)

Country Link
FR (1) FR1350673A (en)
GB (1) GB1025980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174263A (en) * 1985-04-15 1986-10-29 Raytheon Co Frequency changer circuits

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728020A1 (en) * 1987-08-22 1989-03-02 Spectrospin Ag METHOD FOR REDUCING THE PROPORTION OF NOISE SIGNALS IN THE OUTPUT SIGNAL OF A MIXER, AND FOR IMPLEMENTING MIXED TRAINERS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174263A (en) * 1985-04-15 1986-10-29 Raytheon Co Frequency changer circuits
GB2174263B (en) * 1985-04-15 1989-06-21 Raytheon Co Frequency conversion circuits

Also Published As

Publication number Publication date
FR1350673A (en) 1964-01-31

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