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US 8,912,833 B2Granted
Device and method for pulse width modulation
AssigneeInfineon Technologies AG
InventorChristoph Braun
Life of this patent
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Abstract
A device and a method for pulse width modulation is disclosed, wherein the temporal occurrence of both the respectively rising and the respectively falling edges of a pulse signal is varied.
Claims17
A method for pulse width modulation comprising:
- generating a first pulse width modulated pulse signal;
- and
- generating a second pulse width modulated pulse signal from said first pulse width modulated pulse signal, wherein for generating one single pulse of said second pulse width modulated pulse signal a first and a second pulse of the first pulse width modulated pulse signal are merged such that a time duration of a logic high state of the one single pulse of said second pulse width modulated pulse signal corresponds to the sum of a time duration of a logic high state of the first pulse of the first pulse width modulated pulse signal and a time duration of a logic high state of the second pulse of the first pulse width modulated pulse signal.
A device including pulse width modulation comprising:
- a pulse width modulator system comprising:
- means for merging a first and a second pulse of a first pulse width modulated pulse signal to generate one single pulse of a second pulse width modulated pulse signal such that a time duration of a logic low state of the one single pulse of said second pulse width modulated pulse signal corresponds to the sum of a time duration of a logic low state of the first pulse of the first pulse width modulated pulse signal and a time duration of a logic low state of the second pulse of the first pulse width modulated pulse signal.
A system comprising:
- a device for pulse width modulation configured to provide a pulse width modulated output signal having a varied temporal occurrence of both the rising edges and the falling edges of pulses thereof, the device comprising a merger to merge a first and a second pulse of a pulse width modulated pulse signal for generating one single pulse of the pulse width modulated output signal such that a logic high state of the one single pulse of the pulse width modulated output signal has a time duration corresponding to the sum of a time duration of a logic high state of the first pulse of the pulse width modulated pulse signal and a time duration of a logic high state of the second pulse of the pulse width modulated pulse signal;
- and
- a feedback system configured for feeding back the pulse width modulated output signal in a loop.
A method of pulse width modulation comprising:
- generating a first pulse width modulated signal having a period duration and comprising a series of pulses having rising edges with a temporal occurrence at a beginning of the period and falling edges having a varying temporal occurrence;
- temporally mirroring alternating pulses of the series of pulses of the first pulse width modulated signal;
- and
- merging each temporally mirrored pulse of the first pulse width modulated signal with the immediately preceding or the immediately following pulse of the series to form a second pulse width modulated signal, wherein pulses of the second pulse width modulated signal have rising and falling edges with varying temporal occurrences and a period duration twice that of the period duration of pulses of the first pulse width modulated signal, and wherein a time duration of a logic high state of pulses of the second pulse width modulated signal correspond to a sum of a time duration of logic high states of the corresponding temporally mirrored pulse and the immediately preceding or the immediately following pulse of the first pulse width modulated signal.
1 more element
Dependencies are inferred from the claim text.