DIGITALLY CALIBRATED SAWTOOTH GENERATOR FOR PWM BASED BUCK CONVERTERS
Embodiments herein relate to a circuit which generates a sawtooth waveform based on an adaptive feedback loop that self-corrects the ramp up rate to account for variations in a device. The sawtooth waveform is obtained by repeatedly charging and discharging a capacitor according to a clock signal. T...
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Format | Patent |
Language | English |
Published |
24.02.2022
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Abstract | Embodiments herein relate to a circuit which generates a sawtooth waveform based on an adaptive feedback loop that self-corrects the ramp up rate to account for variations in a device. The sawtooth waveform is obtained by repeatedly charging and discharging a capacitor according to a clock signal. The sawtooth waveform can be sampled once per clock period at a comparator which provides a corresponding binary output to a state machine. If the binary output indicates the amplitude of the sawtooth waveform is below a desired maximum voltage, the state machine outputs a code word to a digitally-controlled variable current source to increase the output current. The sawtooth waveform can be used to provide a pulse-width modulated (PWM) waveform such as for a DC-DC converter. |
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AbstractList | Embodiments herein relate to a circuit which generates a sawtooth waveform based on an adaptive feedback loop that self-corrects the ramp up rate to account for variations in a device. The sawtooth waveform is obtained by repeatedly charging and discharging a capacitor according to a clock signal. The sawtooth waveform can be sampled once per clock period at a comparator which provides a corresponding binary output to a state machine. If the binary output indicates the amplitude of the sawtooth waveform is below a desired maximum voltage, the state machine outputs a code word to a digitally-controlled variable current source to increase the output current. The sawtooth waveform can be used to provide a pulse-width modulated (PWM) waveform such as for a DC-DC converter. |
Author | Munoz Constantine, Juan Schaef, Christopher Janardanan, Ajay Lyakhov, Alexander |
Author_xml | – fullname: Schaef, Christopher – fullname: Munoz Constantine, Juan – fullname: Lyakhov, Alexander – fullname: Janardanan, Ajay |
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Snippet | Embodiments herein relate to a circuit which generates a sawtooth waveform based on an adaptive feedback loop that self-corrects the ramp up rate to account... |
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SubjectTerms | BASIC ELECTRONIC CIRCUITRY ELECTRICITY PULSE TECHNIQUE |
Title | DIGITALLY CALIBRATED SAWTOOTH GENERATOR FOR PWM BASED BUCK CONVERTERS |
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