Coding Circuit for the Conversion of a Programmed Resistor into a 4 Bit Word
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07
When a modem is installed by a customer to interface a Central Exchange, for example, a Computer Processing Unit (CPU), the emission level of the modem is adjusted in the Central Exchange with an appropriate resistor (Rx). It is often desired that the CPU sense the value of this resistor, and convert its analog value into a binary word, e.g., a 4-bit word.