Switching power amplifier
First Claim
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1. A switching amplifier, comprising:
- a modulator for converting a main input signal to a high frequency modulated switching signal and for providing voltage amplification of the main input signal;
a power output stage coupled with an output of the modulator for receiving the voltage amplified main input signal and for providing a current amplification of the main input signal for providing a main output signal for driving a load; and
a feedback module for correction of the main output signal in relation to the main input signal, with the modulator comprising;
a constant switching current source and voltage level translator for providing constant current and voltage to the power output stage;
a comparator coupled with an input of the constant switching current source and voltage level translator through a regulator mechanism, with the comparator comparing the main input signal with the main output signal for maintaining a linearly amplified replica of the main input signal;
a ramp generator coupled with the input of the constant switching current source and voltage level translator through the regulator mechanism, with the ramp generator providing a modulation frequency for the switching amplifier and;
the regulator mechanism coupled with the input of the constant switching current source and voltage level translator for regulating a voltage of the switching amplifier.
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Abstract
The present invention discloses a switching amplifier, comprising a modulator for converting a main input signal to a high frequency modulated switching signal and for providing voltage amplification of the main input signal. The present invention further includes a power output stage coupled with an output of the modulator for receiving the voltage amplified main input signal and for providing a current amplification of the main input signal for providing a main output signal for deriving a load. Further included is a feedback module for correction of the main output signal in relation to the main input signal.
61 Citations
22 Claims
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1. A switching amplifier, comprising:
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a modulator for converting a main input signal to a high frequency modulated switching signal and for providing voltage amplification of the main input signal; a power output stage coupled with an output of the modulator for receiving the voltage amplified main input signal and for providing a current amplification of the main input signal for providing a main output signal for driving a load; and a feedback module for correction of the main output signal in relation to the main input signal, with the modulator comprising; a constant switching current source and voltage level translator for providing constant current and voltage to the power output stage; a comparator coupled with an input of the constant switching current source and voltage level translator through a regulator mechanism, with the comparator comparing the main input signal with the main output signal for maintaining a linearly amplified replica of the main input signal; a ramp generator coupled with the input of the constant switching current source and voltage level translator through the regulator mechanism, with the ramp generator providing a modulation frequency for the switching amplifier and; the regulator mechanism coupled with the input of the constant switching current source and voltage level translator for regulating a voltage of the switching amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for signal amplification, comprising the acts of:
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receiving a main input signal; modulating the system input signal for outputting a modulated signal; providing the modulated signal to a power switching stage for voltage and current amplifications of the modulated signal for driving a load; and recovering the main output signal by removing a modulated component for driving the load and for providing feedback signal as the output feedback signals to a feedback module with the act of modulating the system input signal comprising; comparing the main input signal with an output signal for maintaining a linearly amplified replica of the main input signal and generating a system input signal; providing a linearly sloped signal; and regulating the system input signal and the linearly sloped signal for providing a constant switching current and voltage to a power switching stage. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification