GB1520121A - Frequency dividing circuits - Google Patents

Frequency dividing circuits

Info

Publication number
GB1520121A
GB1520121A GB772875A GB772875A GB1520121A GB 1520121 A GB1520121 A GB 1520121A GB 772875 A GB772875 A GB 772875A GB 772875 A GB772875 A GB 772875A GB 1520121 A GB1520121 A GB 1520121A
Authority
GB
United Kingdom
Prior art keywords
signal
input signal
arrangement
frequency
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
Application number
GB772875A
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.)
Ferranti International PLC
Original Assignee
Ferranti 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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB772875A priority Critical patent/GB1520121A/en
Publication of GB1520121A publication Critical patent/GB1520121A/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
    • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source

Landscapes

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

Abstract

1520121 Frequency dividers FERRANTI Ltd 25 Feb 1976 [25 Feb 1975] 7728/75 Heading H3T A frequency divider comprises an arrangement 11, operable to invert and/or offset selectively at least part of alternate cycles of a periodic input signal at 19 to produce at 38 a signal of lower frequency and an arrangement 13 for deriving from the input signal a switching signal for controlling the inverting and/or offsetting. The arrangement 11 includes an amplifier 14 which operates in an inverting mode when its positive input is earthed by a switch 22 turned on by the switching signal derived via an integrator 25, a comparator 26 and a bistable circuit 27. When the switch 22 is turned off, the amplifier operates in a differential mode with the difference in input voltages determined by the charge voltage on a capacitor 21. The output of amplifier 14 has a waveform corresponding to the square of a sinusoidal signal of half the frequency and twice the amplitude of the input signal and may be applied via a function generator 12 e.g. a square rooting circuit. The input signal may be a sawtooth wave.
GB772875A 1976-02-25 1976-02-25 Frequency dividing circuits Expired GB1520121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB772875A GB1520121A (en) 1976-02-25 1976-02-25 Frequency dividing circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB772875A GB1520121A (en) 1976-02-25 1976-02-25 Frequency dividing circuits

Publications (1)

Publication Number Publication Date
GB1520121A true GB1520121A (en) 1978-08-02

Family

ID=9838615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB772875A Expired GB1520121A (en) 1976-02-25 1976-02-25 Frequency dividing circuits

Country Status (1)

Country Link
GB (1) GB1520121A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee