HALL EFFECT SENSOR OPTION SELECT SENSING SCHEME
Original Publication Date: 1997-Dec-01
Included in the Prior Art Database: 2002-Jun-17
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.