RE-CONFIGURABLE MULTIPURPOSE ANALOG INTERFACE
First Claim
1. An interface circuit re-configurable to perform a plurality of interface functions, the circuit comprising:
- one or more configurable input signal paths;
a first amplifier having at least a non-inverting input, the first amplifier being configured to receive one of a differential signal and a single ended signal via the one or more configurable input signal paths;
a configurable impedance network having an input, the input of the configurable impedance network being switchably coupled to the non-inverting input of the first amplifier;
a second amplifier having a non-inverting input and an output, the non-inverting input of the second amplifier being switchably coupled to the input of the configurable impedance network; and
a third amplifier having an input and an output, the input of the third amplifier being switchably coupled to the output of the second amplifier, and the output of the third amplifier being coupled to the one or more input signal paths to the first amplifier.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and apparatus are provided for interfacing a digital controller with an analog input means. The system comprises a digital controller with the input of the digital controller coupled to the output of the analog-to-digital converter. The system further comprises a digital-to-analog converter coupled to an analog interface circuit. The analog interface circuit comprises a reconfigurable RC network switchably coupled to a first amplifier or to a second amplifier. The analog interface circuit further comprises a third amplifier having an input being coupled to an output of the second amplifier and the output of the third amplifier being coupled to the one or more input signal paths to the first amplifier.
-
Citations
20 Claims
-
1. An interface circuit re-configurable to perform a plurality of interface functions, the circuit comprising:
-
one or more configurable input signal paths; a first amplifier having at least a non-inverting input, the first amplifier being configured to receive one of a differential signal and a single ended signal via the one or more configurable input signal paths; a configurable impedance network having an input, the input of the configurable impedance network being switchably coupled to the non-inverting input of the first amplifier; a second amplifier having a non-inverting input and an output, the non-inverting input of the second amplifier being switchably coupled to the input of the configurable impedance network; and a third amplifier having an input and an output, the input of the third amplifier being switchably coupled to the output of the second amplifier, and the output of the third amplifier being coupled to the one or more input signal paths to the first amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An analog-interfacing system comprising:
-
a digital-to-analog converter with an input and an output; a digital controller with an input and an output, the output of the digital controller coupled to the input of the digital-to-analog converter; an analog-to-digital converter with an input and an output;
the output of the analog-to-digital converter coupled to the input of the digital controller; andan analog signal conditioning circuit with a plurality of inputs and a plurality of outputs, a first input of the of the plurality of inputs being coupled to the output of the digital-to-analog converter and a first output of the plurality being coupled to the input of the analog-to-digital converter, the analog signal conditioning circuit comprising a first amplifier having an inverting input and a non-inverting input, a first configurable impedance network having an input, the input of the first configurable impedance network being switchably coupled to the non-inverting input of the first amplifier; a second amplifier having a non-inverting input and an output, the non-inverting input of the second amplifier being switchably coupled to the input of the first configurable impedance network; a third amplifier having an input and an output, the input of the third amplifier being switchably coupled to an output of the second amplifier and the output of the third amplifier being coupled to at least one of the inverting input and the non-inverting input of the first amplifier. - View Dependent Claims (11, 13, 14, 15, 16, 17)
-
-
12. (canceled)
-
18. A re-configurable signal conditioning circuit, comprising:
-
means for receiving a first of one or more analog inputs; means for outputting an analog output; a first means for amplifying having an input and an output, the output of the first means for amplifying being coupled to the means for outputting an analog output and the input coupled to the means for receiving one or more analog inputs; a means for filtering and gain control switchably coupled to the input of the first amplifying means; a second means for amplifying having an input and an output, the input of the second means for amplifying being switchably coupled to means for filtering and gain control; a third means for amplifying having an input and an output, the input of the third means for amplifying being switchably coupled to the output of the second means for amplifying and the output of the third means for amplifying being coupled to the means for receiving the one or more analog inputs; and a means for switching configured to switchably connect the means for filtering and gain control to the input of the first amplifying means, to switchably connect the means for filtering and gain control to the input of the second means for amplifying and to switchably connect the output of the second means for amplifying to the input of the third means for amplifying. - View Dependent Claims (19, 20)
-
Specification