Browse Prior Art Database

HALL EFFECT SENSOR OPTION SELECT SENSING SCHEME

IP.com Disclosure Number: IPCOM000008464D
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2002-Jun-17

Publishing Venue

Motorola

Related People

Authors:
Patrick Koskan Joseph PatiƱo

Abstract

The use of a hall effect sensor to develop a voltage that corresponds to a specific magnetic field strength allows for the radio's Option Select A/D to be used to read the accessory type connected with- out the need for an impedance network. In addition, for the specific Option Select schemes used by newer radios such as Astro and Jedi, this invention allows for the elimination of one of the two binary contacts and associated protection circuitry in the accessory and radio.