• BS 7681-3(1993) : 1993 AMD 9659

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    MEASUREMENT OF QUARTZ CRYSTAL UNIT PARAMETERS BY ZERO PHASE TECHNIQUES IN A x-NETWORK - BASIC METHOD FOR THE MEASUREMENT OF TWO-TERMINAL PARAMETERS UP TO 200 MHz BY PHASE TECHNIQUE IN A X-NETWORK WITH COMPENSATION OF THE PARALLEL CAPACITANCE C

    Available format(s): 

    Superseded date:  10-15-1997

    Language(s): 

    Published date:  11-24-2012

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Committees responsible
    National foreword
    Method
    1 Scope
    2 Co compensation circuit
    2.1 Electrical specifications
    2.2 Mechanical specifications
    3 Crystal unit parameters with and without Co
         compensation
    3.1 Series resonance frequency fs and resonance
         frequency fr
    3.2 Motional resistance R1 and resonance resistance Rr
    3.3 Motional capacitance C1 and motional inductance L1
    4 Test circuit
    4.1 The pi-network
    4.2 Accessories of the pi-network
    4.3 Associated equipment
    4.4 Compensation circuit
    5 Method of measurement
    5.1 Initial calibration of the pi-network
    5.2 Tuning of the compensation circuit
    5.3 Frequency and resistance measurement
    5.4 Evaluation of the motional capacitance C1 and
         motional inductance L1
    Appendices
    A Analysis of the difference of f, R, C1, and L1 as
         a result of measurement methods with and without
         compensation of Co
    B Additional information on accuracy
    C Additional information on circuit components given
         in Figures 4a) and 4b)
    Table
    A1 Typical values for parameters of oscillator crystal
         units, and the calculated theoretical differences
         between parameters increased with and without
         compensation
    Figures
    1 Equivalent circuit of a crystal unit with
         compensation of Co
    2 Impedance diagram of a crystal unit without
         compensation of parallel capacitance Co
    3 Impedance diagram of a crystal unit when Co is
         compensated with a properly tuned compensation
         network according to Figure 1
    4a Simplified diagram of the pi-network with
         electrical adjustment of Co compensation
    4b Simplified diagram of the pi-network with
         mechanical adjustment of Co compensation
    5 Test circuit

    Abstract - (Show below) - (Hide below)

    Specifies a method for the measurement of the parameters of quartz crystal units. Coverage includes electrical specifications, mechanical specifications, and compensation circuit. Also includes appendices and diagrams. AMD 9659 RENUMBERS THIS STANDARD

    General Product Information - (Show below) - (Hide below)

    Committee ECL/11
    Development Note Renumbered and superseded by BS EN 60444-3 (11/2005)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
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