Circuit and Method for Pulse Width Modulation by Means of Synchronized, Self-Oscillating Pulse Width Modulators
First Claim
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1. A pulse width modulator circuit comprising:
- two self-oscillating pulse width modulators;
a synchronization circuit for synchronizing the two self-oscillating pulse width modulators; and
an auxiliary-signal generating circuit for generating an auxiliary signal that is coupled into the two self-oscillating pulse width modulators.
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Abstract
A pulse width modulator circuit has two self-oscillating pulse width modulators and a synchronization circuit for synchronizing the two self-oscillating pulse width modulators. It also comprises an auxiliary-signal generating circuit for generating an auxiliary signal which is coupled into the two self-oscillating pulse width modulators.
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Citations
28 Claims
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1. A pulse width modulator circuit comprising:
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two self-oscillating pulse width modulators;
a synchronization circuit for synchronizing the two self-oscillating pulse width modulators; and
an auxiliary-signal generating circuit for generating an auxiliary signal that is coupled into the two self-oscillating pulse width modulators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A three-valued pulse width modulator, comprising:
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two self-oscillating pulse width modulators;
a synchronization circuit for synchronizing the two self-oscillating pulse width modulators;
a circuit for combining two-valued pulse-width modulated signals generated by the two self-oscillating pulse width modulators into a three-valued pulse-width modulated signal; and
an auxiliary-signal generating circuit for generating an auxiliary signal that is coupled into the two self-oscillating pulse width modulators. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A pulse width modulator circuit comprising:
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two self-oscillating pulse width modulators;
a synchronization circuit that is coupled to synchronization inputs of the two self-oscillating pulse width modulators and synchronizes these; and
an auxiliary-signal generating circuit, outputs of which are coupled to signal inputs of the self-oscillating pulse width modulators and couples an auxiliary signal into the signal inputs of the self-oscillating pulse width modulators. - View Dependent Claims (18, 19)
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20. A pulse width modulator circuit comprising:
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two self-oscillating pulse width modulators;
a synchronization circuit that is coupled to synchronization inputs of the two self-oscillating pulse width modulators; and
an auxiliary-signal generating circuit, outputs of the auxiliary signal generating circuit being coupled to auxiliary-signal inputs of the self-oscillating pulse width modulators, in order to couple an auxiliary signal into the self-oscillating pulse width modulators, the auxiliary-signal inputs being separate from signal inputs of the self-oscillating pulse width modulators. - View Dependent Claims (21, 22)
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23. A circuit arrangement comprising:
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a digital data pump;
a digital/analog converter following the digital data pump; and
a pulse width modulator circuit, following the digital/analog converter, the pulse width modulator comprising;
two self-oscillating pulse width modulators; and
a synchronization circuit for synchronizing the two self-oscillating pulse width modulators, wherein;
an auxiliary-signal generating circuit for generating an auxiliary signal that is coupled into the two self-oscillating pulse width modulators is provided in a digital data pump.
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24. A method for the pulse width modulation of two signals, the method comprising:
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supplying two signals to a self-oscillating pulse width modulator;
coupling an auxiliary signal into the two self-oscillating pulse width modulators; and
synchronizing the two self-oscillating pulse width modulators using the auxiliary signal. - View Dependent Claims (25, 26, 27)
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28. A method for generating a three-valued pulse-width modulated signal from two input signals, the method comprising:
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supplying each input signal to a self-oscillating pulse width modulator;
coupling an auxiliary signal into the two self-oscillating pulse width modulators;
synchronizing the two self-oscillating pulse width modulators; and
combining the output signals of the self-oscillating pulse width modulators to generate the three-valued pulse-width modulated signal.
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Specification