Pulse width signal overlap compensation techniques
AssigneeAdesto Technologies Corporation
InventorsShiyu Zhou, Cormac O'Sullivan
Life of this patent
Estimating the term…
Abstract
A pulse signal compensation circuit of a pulse generator can include a pulse measurement circuit and a compensation generator circuit. The pulse measurement circuit can be configured to receive a plurality of pulse signals and to generate an average duty cycle or pulse overlap signal proportional to the duty cycle or pulse overlap of the plurality of pulses. The compensation generator circuit can be configured to receive the average duty cycle or pulse overlap signal and generate a duty cycle or pulse overlap compensation signal based on the average duty cycle or pulse overlap signal. The compensation signal can be utilized to adjust the duty cycle, amount of positive or negative pulse width overlap, and or the like of the plurality of pulse signals.
Claims19
A circuit comprising:
- a pulse measurement circuit configured to generate an average duty cycle or pulse overlap signal based on a plurality of pulse signals, the pulse measurement circuit including;
- a plurality of resistive switching elements coupled between a first supply potential and a first node and controlled by the plurality of pulse signals;
- and
- a constant current source coupled between the first node and a second supply potential;
- a compensation generator circuit configured to generate a duty cycle or pulse overlap compensation signal based on the average duty cycle or pulse overlap signal, the compensation generator circuit including an inverting operational amplifier with a predetermined gain and including a non-inverting input coupled to a reference voltage, an inverting input coupled to the first node and an output coupled to a second node;
- and
- a pulse generator configured to generate the plurality of pulse signals based on the duty cycle or pulse overlap compensation signal.
A pulse signal compensation circuit comprising:
- a pulse measurement circuit configured to receive a plurality of phase shifted pulse signals and to generate an average duty cycle or pulse overlap signal proportional to a duty cycle or pulse overlap of the plurality of phase shifted pulse signals, wherein the pulse measurement circuit comprises;
- a plurality of resistive switching elements coupled between a first supply potential and a first node and controlled by the plurality of pulse signals;
- and
- a constant current source coupled between the first node and a second supply potential;
- and
- a compensation generator circuit configured to receive the average duty cycle or pulse overlap signal and generate a duty cycle or pulse overlap compensation signal based on the average duty cycle or pulse overlap signal, wherein the compensation generator circuit comprises an inverting operational amplifier with a predetermined gain and including a non-inverting input coupled to a reference voltage, an inverting input coupled to the first node and an output coupled to a second node.
A method of compensating a duty cycle of a plurality of pulse signals comprising:
- generating the plurality of phase shifted pulse signals;
- generating an average duty cycle or pulse overlap measurement signal based on the plurality of phase shifted pulse signals;
- generating a duty cycle or pulse overlap compensation signal as a function of the average duty cycle or pulse overlap measurement signal from a plurality of resistive switching elements coupled between a first supply potential and a first node and controlled by the plurality of pulse signals and a constant current source coupled between the first node and a second supply potential;
- and
- compensating the duty cycle or pulse overlap of the plurality of phase shifted pulse signals using the duty cycle or pulse overlap compensation signal.
A pulse signal compensation circuit comprising:
- a pulse measurement circuit configured to receive a plurality of phase shifted pulse signals and to generate an average duty cycle or pulse overlap signal proportional to a duty cycle or pulse overlap of the plurality of phase shifted pulse signals, wherein the pulse measurement circuit comprises;
- a plurality of resistive switching elements coupled between a first supply potential and a first node and controlled by the plurality of pulse signals;
- and
- a constant current source coupled between the first node and a second supply potential;
- and
- a compensation generator circuit configured to receive the average duty cycle or pulse overlap signal and generate a duty cycle or pulse overlap compensation signal based on the average duty cycle or pulse overlap signal, wherein the compensation generator circuit comprises an integrating operational amplifier including a capacitor coupled between an inverting input and an output, a non-inverting input coupled to a duty cycle voltage, the inverting input coupled to the first node and the output coupled to a second node.
Dependencies are inferred from the claim text.