US3490047A - Multiple sampler circuit - Google Patents

Multiple sampler circuit Download PDF

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Publication number
US3490047A
US3490047A US525048A US3490047DA US3490047A US 3490047 A US3490047 A US 3490047A US 525048 A US525048 A US 525048A US 3490047D A US3490047D A US 3490047DA US 3490047 A US3490047 A US 3490047A
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signal
samplers
phase
sample
signals
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Expired - Lifetime
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US525048A
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English (en)
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Giacomo Vargiu
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C27/00—Electric analogue stores, e.g. for storing instantaneous values
    • G11C27/02—Sample-and-hold arrangements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
    • H03K5/135—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals by the use of time reference signals, e.g. clock signals

Definitions

  • This invention relates to signal samplers and has as its main object the provision of a circuit which has higher bandwidth than a conventional signal sampler when operated at a selected signal sampling rate.
  • a phase separator 9 is connected to receive signal to be sampled from a source 11 for producing at least two signals at the outputs 13, 15 which are separated in phase by uniform increments but which have the same wave shape as the applied signal.
  • Each of these output signals is applied to a sampler 17, 19 which is rendered momentarily conductive by a sample signal applied thereto from the sample signal generator 21.
  • These sample signals are also separated in time corresponding to the relative phase shift of the signal to be sampled appearing at the outputs 13, 15 of phase separator 9. This produces sample pulses having amplitudes related to the amplitude of the applied signal at the sample instant.
  • sample pulses from the two samplers 17, 19 are combined in network 23 to produce a train of sample pulses at the input of stretcher circuit 25 which includes twice the sample information per cycle of signal from source 11 as is available using conventional sampling techniques and which contains predominantly only odd harmonics of the frequency of the signal from generator 21.
  • This multiple sampling techniques may be further ex tended, for example, by sampling at four equally-spaced intervals.
  • the applied signal may be selectively transformed as by integration or differentiation to provide a change of signal amplitude per unit time about the additional sample points t and L, which is normally approximately equal to the change of signal amplitude per unit time about the sample points t and t
  • This provides a plurality of sample pulses per cycle of applied signal having approximately amplitudes which may vary about a normal value in response to phase error and noise at the sampling instant.
  • Such a phase-locked system with the sample signal generator 21 operating as the reference frequency is shown as a feedback circuit connected through switches 20, 22 from the output of the pulse stretcher 25 (which maintains a steady output between sample pulses at a value related to the amplitude of a preceding pulse), through a control circuit 27 to the source 11 to maintain the phase of signal from source 11 in a fixed relationship to the signals from generator 21.
  • Utilization circuit 29 operates on the output signal from stretcher circuit 25, which output signal is proportional to the phase difference between the signal to be sampled from source 11 and the signal from generator 21 during proper phase-locked operation of the circuit shown.
  • the signal sampler of the present invention may also be used in other sampler circuits with similar advantages of greater sample information .per cycle of applied signal and wider effective operating bandwidth.
  • Signal sampling apparatus comprising:
  • samplers each having an output, an applied signal input and a control signal input and operative to conduct momentarily in response to a signal applied to the control signal input thereof for producing a sample pulse at the output thereof having an amplitude related to the amplitude of signal applied to the applied signal input thereof at the moment of sampler conduction;
  • circuit means having an input and having a plurality of outputs connected for applying to the applied signal inputs of the samplers an in-phase signal and an out-of-phase signal which have time-varying amplitudes that are proportional at every instant of time to the time-varying amplitude during a cycle of signal appearing at the input of said circuit means;
  • control signal generating means connected to the control signal inputs of said samplers for applying control signals to said samplers in non-simultaneous succession to render the samplers momentarily conductive in sequence only at substantially the same single portion of the cycle of the phase-separated signals applied to the applied signal inputs of said samplers;
  • control signal generating means applies control signals to each of the samplers at times during a cycle of the signal at an applied signal input of a sampler which are separated by equal increments for rendering each of the samplers momentarily conductive during the portions of the cycles of signals at the applied signal input of each of the samplers for which the rates of change with time of the amplitudes of such applied signals are substantially equal.
  • Signal sampling apparatus as in claim 2 comprising:
  • said circuit means produces a pair of out-of-phase signals at the outputs thereof; and said control signal generating means applies control signals to said samplers in alternating sequence to render said samplers alternately conductive in opposite phase relationship.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
US525048A 1966-02-04 1966-02-04 Multiple sampler circuit Expired - Lifetime US3490047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52504866A 1966-02-04 1966-02-04

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US3490047A true US3490047A (en) 1970-01-13

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US525048A Expired - Lifetime US3490047A (en) 1966-02-04 1966-02-04 Multiple sampler circuit

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US (1) US3490047A (enrdf_load_stackoverflow)
JP (1) JPS4842753B1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0317783U (enrdf_load_stackoverflow) * 1989-06-30 1991-02-21

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458599A (en) * 1946-12-04 1949-01-11 Bell Telephone Labor Inc Circuit for sampling balanced signals
US2824172A (en) * 1950-08-14 1958-02-18 Rca Corp Sampling apparatus
US3234472A (en) * 1961-04-11 1966-02-08 Photronics Corp System for eliminating photomultiplier noise
US3237112A (en) * 1960-02-08 1966-02-22 Gen Electric Apparatus for recognizing waveforms of variable time duration representing waveforms on a logarithmic time scale
US3307409A (en) * 1959-02-26 1967-03-07 Jr George C Newton Method of and apparatus for measuring angular motion
US3355668A (en) * 1963-09-30 1967-11-28 Bendix Corp Tunable notch filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458599A (en) * 1946-12-04 1949-01-11 Bell Telephone Labor Inc Circuit for sampling balanced signals
US2824172A (en) * 1950-08-14 1958-02-18 Rca Corp Sampling apparatus
US3307409A (en) * 1959-02-26 1967-03-07 Jr George C Newton Method of and apparatus for measuring angular motion
US3237112A (en) * 1960-02-08 1966-02-22 Gen Electric Apparatus for recognizing waveforms of variable time duration representing waveforms on a logarithmic time scale
US3234472A (en) * 1961-04-11 1966-02-08 Photronics Corp System for eliminating photomultiplier noise
US3355668A (en) * 1963-09-30 1967-11-28 Bendix Corp Tunable notch filter

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JPS4842753B1 (enrdf_load_stackoverflow) 1973-12-14

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