Back to results
US 9,171,189 B2Granted
Systems and methods for preventing saturation of analog integrator output
AssigneeThe Trustees of Columbia University in the City of New York
InventorsYannis Tsividis, Ning Guo
Life of this patent
Estimating the term…
Abstract
Systems and methods for preventing saturation of analog integrator outputs are provided. Applications of the systems and methods in hybrid analog-digital integrators are also provided. Exemplary systems include two switches, one operational amplifier, one capacitor C, four gain blocks, three comparators, one XOR gate, one OR gate, one T flip-flop, and one digital counter.
Claims26
A system for preventing saturation of an integrator output comprising:
- an integrator receiving an input signal and generating an output, the integrator comprising:
- an operational amplifier having a first input and an output;
- and
- a capacitor coupling the output of the operational amplifier with the first input of the operational amplifier;
- a digital counter having a value and configured to adjust the value of the digital counter when an output of the integrator reaches a threshold;
- a first switch coupling the input signal to the first input of the operational amplifier;
- and
- a first comparator having a first input coupled to the output of the operational amplifier, a second input coupled to ground, and an output coupled to a first input of an XOR gate;
- wherein the input signal is reversed by the first switch when the output of the integrator reaches the threshold;
- wherein the digital counter combines the value of the digital counter with the output of the integrator to generate a combined output.
7 more elements
A method for preventing saturation of an integrator output comprising:
- providing an integrator receiving an input signal and generating an output;
- adjusting a value of a digital counter when the output of the integrator reaches a threshold;
- reversing the input signal when the output of the integrator reaches the threshold;
- combining the value of the digital counter with the output of the integrator to generate a combined output;
- and
- providing a first comparator having a first input coupled to the output of the operational amplifier, a second input coupled to ground, and an output coupled to a first input of an XOR gate;
- wherein the integrator comprises:
- an operational amplifier having a first input and an output;
- and
- a capacitor coupling the output of the operational amplifier with the first input of the operational amplifier;
- wherein the input signal is reversed by a first switch that couples the input signal to the first input of the operational amplifier.
8 more elements
Dependencies are inferred from the claim text.