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Abstract
Analog Multi Channel Recorders have a limited paper width to reproduce the data of each of the channels and in view of the finite line width, the signal range that can be recorded is 100:1 for most commercial recorders. Seismic signals vary over a range of 1:20,000 and hence it is preferred to use an AGC circuitry to avoid overloading of the recorder. It is more convenient to use a digital AGC on a multiplexed digital data and the paper describes a digital AGC circuit developed. The circuit described is a very low-speed one, typical of applications for seismic signals.
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G.V. Anjaneyulu
Anjaneyulu (G V): Passed Bachelor of Engineering from Andhra University in the year 1963 and ranked First in the Telecommunication Engineering Branch. Passed M. Tech. from IIT, Bombay in 1965 and worked in Philips India Ltd., for an year. Worked as a Lecturer from 1966 to 1972 in Osmania University. Joined ECIL in 1972 and presently working as a Technical Manager in ECIL. Assisted Government of Andhra Pradesh in formulation of curriculum for Diploma Courses. Responsible at ECIL for productionization of Measuring and Industrial Instruments including Oscilloscopes, Digital Systems, Turbine Supervisory System and Medical Instruments.
Badri Vishal Bajaj
Bajaj, Bardi Vishal: (b. 1951 October 26): - Obtained Bachelor of Engineering Degree in Electronics and Telecommunications (with distinction) from Osmania University in the year 1974. Joined Electronics Corporation of India Ltd., in February 1975 and presently working as Sr. Tech. Officer, engaged in the development of a large Digital Data Acquisition System. Also working on the Development of Microprocessor-based digital system.