Power amplifier having a nonlinear output capacitance equalization
First Claim
1. A power amplifier (PA) system comprising:
- a signal path comprising a plurality of gain stages;
an output stage the input of which is coupled to the output of the last gain stage of the signal path, the output stage having a nonlinear output capacitance; and
a capacitance equalization block connected to the output of the output stage that at least approximately compensates for the nonlinearity of the output stage output capacitance;
such that the total output capacitance of the PA is essentially constant.
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Accused Products
Abstract
Power amplifier (PA), regardless of the process used for the manufacturing of its devices, suffers from a nonlinear output capacitance that has significant impact on various aspects of the PA performance. This output capacitance is dependent on the large output voltage swing. Accordingly a compensation capacitance is added at the output of the PA that has a behavior that is inverse respective of the output voltage of that of the output capacitance of the PA. Connecting the compensation capacitor in parallel to the PA output capacitance, results in a total capacitance that is the sum of the output capacitance and its compensation capacitance. The total output capacitance is therefore essentially stable throughout the output voltage swing.
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Citations
10 Claims
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1. A power amplifier (PA) system comprising:
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a signal path comprising a plurality of gain stages; an output stage the input of which is coupled to the output of the last gain stage of the signal path, the output stage having a nonlinear output capacitance; and a capacitance equalization block connected to the output of the output stage that at least approximately compensates for the nonlinearity of the output stage output capacitance; such that the total output capacitance of the PA is essentially constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification