Browse Prior Art Database

Rise Time Integrator Tuning

IP.com Disclosure Number: IPCOM000090299D
Original Publication Date: 1969-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Truman, TS: AUTHOR

Abstract

This is a technique for tuning rise-time integrators for identical input output transfer functions over a wide frequency range. The rise-time integrator, drawing A, comprises two low-pass T-filters back-to-back. The filter is compensated to present a 50 ohm input impedance to a pulse when the output is terminated in 50 ohms. By this technique, a time domain reflectometer is connected at the input to the integrator and the output is connected to ground. A unit pulse from the time domain reflectometer is then sent through the integrator circuit and its reflection is displayed on the oscilloscope as in drawing B. The portion of the curve primarily of interest is shown in drawing C. The values of capacitors C1 and C2 within the integrator are variable.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Rise Time Integrator Tuning

This is a technique for tuning rise-time integrators for identical input output transfer functions over a wide frequency range. The rise-time integrator, drawing A, comprises two low-pass T-filters back-to-back. The filter is compensated to present a 50 ohm input impedance to a pulse when the output is terminated in 50 ohms. By this technique, a time domain reflectometer is connected at the input to the integrator and the output is connected to ground. A unit pulse from the time domain reflectometer is then sent through the integrator circuit and its reflection is displayed on the oscilloscope as in drawing B. The portion of the curve primarily of interest is shown in drawing C. The values of capacitors C1 and C2 within the integrator are variable. Therefore, given the input and output transitions required, each filter is tuned by observing the reflected pulse shown in drawing C and adjusting C1 and C2 accordingly. This tuning procedure makes it possible to match a group of filters for all parameters with one tuning adjustment.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]