Low-noise programmable current source
First Claim
Patent Images
1. A low-noise programmable current source comprising;
- an output digital to analog converter for providing an output load current; and
a control circuit, responsive to an input defining a predetermined load current, for generating for said digital to analog converter, a control word and a control voltage, said control word and control voltage driving said digital to analog converter to produce said predetermined load current and said control voltage setting the compliance voltage of said digital to analog converter to minimize current noise in said digital to analog converter.
1 Assignment
0 Petitions
Accused Products
Abstract
A low-noise programmable current source includes an output digital to analog converter for providing an output load current; and a control circuit, responsive to an input defining a predetermined load current for generating, for the digital to analog converter, a control word and a control voltage; the control word and the control voltage drive the digital to analog converter to produce the predetermined load current and the control voltage sets the compliance voltage of the digital to analog converter to minimize current noise in the digital to analog converter.
-
Citations
29 Claims
-
1. A low-noise programmable current source comprising;
-
an output digital to analog converter for providing an output load current; and a control circuit, responsive to an input defining a predetermined load current, for generating for said digital to analog converter, a control word and a control voltage, said control word and control voltage driving said digital to analog converter to produce said predetermined load current and said control voltage setting the compliance voltage of said digital to analog converter to minimize current noise in said digital to analog converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A voltage controlled oscillator (VCO) system having a low-noise programmable current source comprising:
-
an output digital to analog converter for providing an output load current to the VCO; and a control circuit responsive to an input defining a predetermined load current for the VCO for generating, for the digital to analog converter, a control word and a control voltage, said control word and control voltage driving said digital to analog converter to produce said predetermined load current for said VCO, said control voltage setting the compliance voltage of said digital to analog converter to substantially minimize current noise in the digital to analog converter and phase noise in the VCO.
-
Specification