A Simple Active-RC Delay Line

Abstract

A new easy to realize active-RC analogue delay line with tap outputs available at every half-bit delay intervals has been described. The basic delay section, comprising of only two transistors and a few RC elements, has a delay to rise-time ratio of 1.3 and works upto a frequency range of 500 kHz. A tapped delay line of lengths upto 15 can be easily made by cascading the basic delay sections. This delay line is particularly useful in the audio and lower frequency ranges where other types of delay lines are more cumbersome. Even in the discrete form, it is quite compact and can be further miniaturized by using IC/thin/thick-film hybrid techniques.

Indexing Terms:

• Active-RC Delay Line
• Matched Filters
• Tapped Delay Lines

Additional information

Notes on contributors

S. L. Maskara

MASKARA, S L (Dr.): (b. June 1942, Begusarai; Bihar) Graduated in Telecommunication Engineering from the Bihar Institute of Technology, Sindri in 1963, obtained ME degree in Electrical Communication Engg. from the Indian Institute of Science, Bangalore in 1968 and the PhD degree in Electronics and Elect. Comm. Engg. from the Indian Institute of Technology, Kharagpur in 1977.

He took up a teaching assignment at BIT, Sindri during 1963–64. He has been on the faculty of the Deptt. of Electronics and Elect. Comm. Engg., IIT, Kharagpur, since 1966. His interests are in the fields of digital communication systems, coded and wideband communication systems, network theory and electronic circuits.