Picoammeter

Introduction

A national research organisation is offering a technology for picoammeter for measuring very low leakage current of semiconductor devices, insulating materials and photo detectors. It has four input ranges selectable through front panel switch. The readings are obtained on 3 1/2 digit display.

First stage of the Picoammater is a current to voltage converter. The signal is then passed through a low pass filter and digitised to get better than 14 bits accuracy. This consitutes the core of the Picoammeter and it is implemented on one card alongwith 7 segment display drive logic. GPIB interface is realised in a second card. Dimensions of the cards are 5.9" x 6.5". The circuit requires +5V and 15V power supplies which are derived from 230V1 operated single power module of size 170 mm x 85 mm x 58 mm.

Marketing of the manufactured product

Marketing should be done by the licensee.

List of Machinery/ Equipment

4 1/2 digit digital multimeter
Oscilloscope with 20 MHz BW

Electrical, Electronics

Leakage current measurement of solid state devices
Photometer current
Electrical resistance of insulator
Very low current oxygen sensors
Electrical conductivity of air
pH meter
Ionisation gauges
Water contamination monitoring
Vacuum measurements
DC current measurement ranges from Picoampere to Amperes.
Bipolar current measurement referenced to system ground
Low warm up time
Portable
GPIB output port
3 1/2 digit display

Inputs Required

Raw Materials: PCB and Chassis

Transfer Forms

Know-how; Patent for sale; Technical assistance

Main Application

Electrical/Electronics/Telecommunications

For further information please contact

Technology Bureau for Small Enterprises
APCTT Building, Qutub Institutional Area
P.O. Box – 4575
New Delhi – 110016, India