Browse Prior Art Database

Fast Complementary Metal Oxide Silicon Driver With Trailing Edge Delay Control

IP.com Disclosure Number: IPCOM000036080D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Kim, IW: AUTHOR [+3]

Abstract

By adding trailing edge delay control to a high performance asymmetric complementary metal oxide silicon (CMOS) driver, applicability of the driver is not limited by the input pulse signal width.

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 68% of the total text.

Page 1 of 2

Fast Complementary Metal Oxide Silicon Driver With Trailing Edge Delay Control

By adding trailing edge delay control to a high performance asymmetric complementary metal oxide silicon (CMOS) driver, applicability of the driver is not limited by the input pulse signal width.

The driver circuits, Figs. 1 and 2, are asymmetric inverters with a gated feedback path for the restore operation. Fig. 1 is the active low driver and is operationally the complement of Fig. 2, the active high driver. Devices T1, T2, T3, T4, T5, and T6 comprise the asymmetric inverter chain. In both circuits, devices T10, T11, T12, T13, and T14 comprise a switch which begins the restore operation once the input to the circuit has returned to an inactive state.

In a typical cycle the circuit of Fig. 1 begins with input IN high, node A low, node B high, output OUT low, node C low, node E high, and node F low. As IN goes active low, device T1 quickly brings node A high, which turns on transistor T4, pulling node B low thus turning transistor T5 on and pulling OUT high. At the same time, IN going low turns transistor T11 off, output of the inverter T12 and T13 goes high, thus turning device T10 off and turning device T14 on. Device T14 is a small device used to clamp node D low while input IN stays active. Nodes D, E, and F do not change states as the input transistions from high to low.

Input IN is then brought high again to begin the restore operation. Device T11 turns on and the output of inver...