Fixed offset digital-to-analog conversion device and method
First Claim
Patent Images
1. A device comprising:
- a current supply circuit to generate a plurality of control currents responsive to a corresponding plurality of digital signals;
an input voltage generating circuit to generate a plurality of input voltages responsive to the plurality of digital signals and control currents, the current supply circuit providing the control currents to the input voltage generating circuit, where the diaital signals identify both the magnitudes of the control currents and the voltage levels of the input voltages; and
a plurality of operational amplifiers to output a plurality of analog signals responsive to the plurality of input voltages.
12 Assignments
0 Petitions
Accused Products
Abstract
I describe and claim an improved digital-to-analog conversion device and method. The device comprises a current supply circuit to generate a plurality of control currents responsive to a plurality of digital signals. An input voltage generating circuit is adapted to generate a plurality of input voltages responsive to the digital signals and the control currents. And a plurality of operational amplifiers is adapted to output a plurality of analog signals responsive to the input voltages.
21 Citations
24 Claims
-
1. A device comprising:
-
a current supply circuit to generate a plurality of control currents responsive to a corresponding plurality of digital signals; an input voltage generating circuit to generate a plurality of input voltages responsive to the plurality of digital signals and control currents, the current supply circuit providing the control currents to the input voltage generating circuit, where the diaital signals identify both the magnitudes of the control currents and the voltage levels of the input voltages; and a plurality of operational amplifiers to output a plurality of analog signals responsive to the plurality of input voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A device comprising:
-
a current supply circuit to generate a first control current responsive to a first digital signal, and a second control current responsive to a second digital signal; an input voltage generating circuit to generate a first input voltage responsive to the first digital signal and the first control current, and a second input voltage responsive to the second digital signal and the second control current; a first operational amplifier to output a first analog signal responsive to the first input voltage; and a second operational amplifier to output a second analog signal responsive to the second input voltage, where a voltage offset between the first and second analog signals remains substantially fixed responsive to chances in the first and second digital signals. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A method comprising:
-
generating a plurality of control currents responsive to a plurality of digital signals; generating a plurality of additional currents; combining the control currents with a plurality of additional currents; generating a plurality of input voltages responsive to the digital signals and the combination of the control currents and the additional currents; and outputting a plurality of analog signals responsive to the input voltages. - View Dependent Claims (21, 22, 23, 24)
-
Specification