Power supply compensation
First Claim
1. An amplifier comprising amplification means comprising an input and an output,said amplification means comprising a switching output stage delivering at least one output signal via said output,said amplification means being fed by power supply means,said amplifier flirt her comprising compensation means providing a compensation signal derived from the power supply voltage of the power supply means,said compensation signal comprising a substantially inverse representation of said power supply voltage andsaid compensation signal being fed to said amplification means via at least one multiplication point in which the compensation signal is multiplied with an input signal received from said input.
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Accused Products
Abstract
The invention relates to an amplifier comprising amplification means (AM) comprising an input and an output,
- said amplification means (AM) comprising a switching output stage delivering at least one output signal (OUS) via said output,
- said amplification means being fed by power supply means (PSM)
- said amplifier further comprising compensation means (CM) providing a compensation signal (CS) derived from the power supply voltage (PSV) of the power supply means (PSM), said compensation signal (CS) comprising a substantially inverse representation of said power supply voltage (PSV) and
- said compensation signal (CS) being fed to said amplification means (AM).
According to the invention, an effective error compensation of the output switching stage may in practice be implemented by establishment of a compensation, which on a run-time basis is based on the voltage of the power supply currently applied in the output switching stage.
8 Citations
58 Claims
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1. An amplifier comprising amplification means comprising an input and an output,
said amplification means comprising a switching output stage delivering at least one output signal via said output, said amplification means being fed by power supply means, said amplifier flirt her comprising compensation means providing a compensation signal derived from the power supply voltage of the power supply means, said compensation signal comprising a substantially inverse representation of said power supply voltage and said compensation signal being fed to said amplification means via at least one multiplication point in which the compensation signal is multiplied with an input signal received from said input.
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49. Method for compensating errors of a power signal comprising a power supply voltage, comprising
performing multiplicatively power supply voltage dependent signal processing on an input utility signal by means of amplification means, establishing a compensation signal comprising a representation of the ratio between a desired voltage and said power supply voltage, and applying said compensation signal to said input utility signal by means of multiplication.
Specification