Circuit and method for selecting a circuit module

Details Circuit and method for selecting a circuit module Circuit and method for selecting a circuit module

1995-01-03

1997-07-08

Holloway, III, Edwin C.

Communications: electrical

Continuously variable indicating

With meter reading

34082577, 34082552, H04Q 100

Patent

active

056466099

ABSTRACT:
A circuit (20) and a method for selecting a circuit module (M.sub.N) from a plurality of circuit modules (M.sub.0 -M.sub.N) coupled to a common bus (23). The circuit (20) includes a plurality of resistor divider networks (RD.sub.0 -RD.sub.N), wherein a single resistor divider network is coupled to a corresponding circuit module. Each resistor divider network (RD.sub.0 -RD.sub.N) provides the corresponding circuit module with an analog voltage upon initialization of the circuit (20). The analog voltage is converted into a digital voltage and serves as a unique address for the corresponding circuit module (M.sub.0 -M.sub.N). An analog electrical signal on the common bus (23) is converted into a digital electrical signal which is compared with the addresses of the plurality of circuit modules (M.sub.0 -M.sub.N). The circuit module having an address that matches the digital electrical signals is selected for receiving data or control signals from external circuitry.

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