GB1003601A - Phase and frequency comparator - Google Patents

Phase and frequency comparator

Info

Publication number
GB1003601A
GB1003601A GB3234561A GB3234561A GB1003601A GB 1003601 A GB1003601 A GB 1003601A GB 3234561 A GB3234561 A GB 3234561A GB 3234561 A GB3234561 A GB 3234561A GB 1003601 A GB1003601 A GB 1003601A
Authority
GB
United Kingdom
Prior art keywords
junction
diodes
derived
inputs
output
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
GB3234561A
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
Priority claimed from DE1960ST016224 external-priority patent/DE1416622A1/en
Priority claimed from DE1960ST016884 external-priority patent/DE1416623A1/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB1003601A publication Critical patent/GB1003601A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
    • H03D13/009—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using diodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1,003,601. Frequency and phase detectors. STANDARD TELEPHONES & CABLES Ltd. Sept. 8, 1961 [Sept. 9, 1960], No. 32345/61. Addition to 952,835. Heading H3A. In a phase detector as in the parent Specification producing also an output D.C. of polarity indicating the sense of any recurrence frequency error above a certain frequency error, the non-linear bi-directional element in series with storage capacitor 26 comprises a pair of parallel opposed diodes 28, 29 and these are back biased by a voltage varying with the amplitudes of the two inputs (normally bi-polar pulses) being compared (applied through capacitors 25, 26) to obviate errors due to amplitude changes of the inputs. This back bias may be self-produced by an R.C. circuit 30-32 energized by the mean rectified current through the diodes, and the output voltage derived from the junction of equal resistors 31, 32 or from a tapping of a single resistor in place of 31, 32. Alternatively one input may be applied through the storage capacitor 26 to the junction of 31, 32 and the D.C. output derived through a resistor from this junction. Alternatively 30 and 32 may both be short-circuited and the back bias applied to the other sides of the diodes by a parallel R.-C. circuit in series with resistors and a D.C. voltage variable with and derived from one at least of the two bi-polar pulse inputs.
GB3234561A 1959-04-04 1961-09-08 Phase and frequency comparator Expired GB1003601A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEST014961 1959-04-04
DE1960ST016224 DE1416622A1 (en) 1960-03-11 1960-03-11 Method for generating a directional voltage which is a function of the phase difference between two alternating voltages
DE1960ST016884 DE1416623A1 (en) 1959-04-04 1960-09-09 Method for generating a directional voltage which is a function of the phase difference between two alternating voltages

Publications (1)

Publication Number Publication Date
GB1003601A true GB1003601A (en) 1965-09-08

Family

ID=7457262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3234561A Expired GB1003601A (en) 1959-04-04 1961-09-08 Phase and frequency comparator

Country Status (2)

Country Link
BE (1) BE637568A (en)
GB (1) GB1003601A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122824A (en) * 1982-06-14 1984-01-18 Western Electric Co Improvements in or relating to timing recovery circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122824A (en) * 1982-06-14 1984-01-18 Western Electric Co Improvements in or relating to timing recovery circuits

Also Published As

Publication number Publication date
BE637568A (en) 1964-01-16

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