The second edition of the highly successful text is intended for use as an introductory course or a second course in Instrumentation. The reviewers comments on the first edition helped refine and crystalise related material leading to the reorganisation of chapters and addition of: l Software-controlled measurements l Time interval measurement when the two events occur arbitrarily, and to indicate the order of occurrence, and a practical set up for the time interval measurement l Multi-phase sequence indicator l Decibel meter l Input circuitry of a frequency counter l Measurement of low-frequencies in a narrow band l Basics of ac bridges l Quality and dissipation factor measurement by phase compensation technique l Impedance measurement in the Cartesian coordinate form l Worked examples provided to illustrate the concepts l Unsolved problems to help students develop skills in using theory

Preface to the Second Edition / Preface to the First Edition / Introduction: Why Digital Measurement at All? / Philosophy of Digital Measurement/Software-Controlled Measurements/About Other Chapters/Problems/Digital Time Measurement Techniques: Introduction/Measurement of a Time Interval between Two Events/Error in time interval measurement/Vernier Technique for Small Time Interval Measurement/Measurement of a time interval smaller than the clock period/Resolution/Precautions/Measurement of time Interval with Constraint/Events occur arbitrarily/Saturated lapse time measurement/Measurement of a Periodic Time/Capacitance of a Periodic Time/Phase Measurement/Requirements of an ideal phase meter/Phase measurement through time measurement/Direct phase measurement/Automatic accumulation method/Phase measurement at a single low frequency/Phase measurement without frequency error/Micro-controller based phase measurement/Multi-Phase Sequence Indicator/Measurement of Time Interval between Two Events Defined by Voltage Levels/Time constant measurement/Accurate measurement of low time constant/Measurement of Capacitance/Measurement of Quality Factor of a Ringing Circuit/Decibel Meter/Problems/Bibliography/ Digital Frequency Measurement Techniques: Introduction/Frequency Measurement/Measurement of the Ration of Two Frequencies/High Frequency Measurement/Frequency difference expansion method/Average Frequency Difference Measurement/Applications/Power System Frequency Deviation Measurement/Fast Low-Frequency Measurement/Measurement of Low-Frequencies in a Narrow Band/Up Counting/Complementary counting/Down Counting/Time Reciprocating Circuit/Frequency range and accuracy/Fast Low-Frequency Measurement of Sinusoidally Varying Signals/Peak Frequency Measurement/A simpler scheme for the maximum/minimum indicator/Problems/Bibliography/ Digitally Programmable Circuits: Introduction/Digitally Programmable Resistors/Digitally Programmable Dividers/Minimal Digital Programmable Gain Amplifiers/Remarks/Programmable Schmitt Triggers/Programmable Dual-Polarity Gain Amplifiers/Programmable Gain Amplifier with Dual-Polarity outputs/Two Stage Programming/Programmable Gain Amplifiers: Applications/Programmable Gain-Constant Circuits/Programmable Notch Filters/Programmable Biquads/Problems/Bibligraphy/ Digital-to-Analog Converters: Introduction/Output-Input Relation/DACs Derived from Programmable Gain Amplifiers/Weighted-Resistor DACs/Two-stage weighted-resistor DACs/ Multi-stage WR-DACs/Weighted-Current DACs/Weighted-Reference Voltage DACs/Ladder DACs/Realization of { N x L} DAC/Minimum spread { N x L} ladder DAC/DAC with the least number of resistors/Minimum total resistance DAC realization/Equal-valued resistor/Minimum total resistance DAC realization Equaal-valued resistor DAC/Switches/A Current Driven DAC/The Inverted Ladder DAC/Binary-Weighted Charge DAC/Input Output Formats of a DAC/Hybrid Multiplier and Divider/Problems/Bibliography/ Digital Voltage Measurement Techniques: Introduction/Indirect Type Analog-to-Digital Converters/Voltage-to-time converters/Voltage-to-frequency converters/Operations in Direct Type Analog-to-Digital Converters/Sampling Theorem/Time Division Multiplexing/Quantization/Direct Type Analog-to-Digital Converters/Digital ramp converter/Tracking type analog-to-digital converter/Successive approximation coverter/Multiple threshold analog-to-digital converters/Comparison Input Circuitry of a Digital Voltmeter/Auto-zero circuit/Bipolar operation/Buffer circuit/Protection/Auto-ranging/Sample and hold circuit/Problems/Bibligraphy/ Digital Voltage Ratiometric Measurement Techniques: Intoduction/Ratiometric Measurement Technique/Voltage ratio meters/Applications/Frequency meter for sinusoidal signals/Modulation index meter/Measurement of Q/The tand-d meter (series RC circuit)/The tand-d meter (parallel RC circuit)/ Measurement of a complex impedance/Digital ohmmeter/Digital capacitance meter/Problems/Bibliography/ Sampling Techniques: Introduction/Two Basic Theorems/Non-integral value theorem/Zero summation theorem/Sampling/Distinct Sampled Instants Theorem/Same Sampled-Magnitude Set Theorem/Correspondence between the Samples/Mean and RMS Value Theorem/Power Evaluation Theorem/Special case/AC power measurement/Energy measurement/Voltage Measurement/Current measurement/Other measurement/Problems / Bibliography / Index

Undergraduate students for the course in Electrical,Electronics, Instrumentation and Computer Engineering.