Power supply stage
AssigneeNujira Limited
InventorsMartin Paul Wilson, Gerard Wimpenny
Life of this patent
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Abstract
There is described a method of generating a power supply tracking a reference signal, comprising the steps of: filtering the reference signal; generating a first voltage in dependence on the filtered reference signal; generating a second voltage in dependence on the reference signal; and combining the first and second voltages to provide a power supply voltage.
Claims47
A method of generating a power supply tracking a reference signal, comprising the steps of:
- filtering the reference signal;
- generating a first voltage in dependence on the filtered reference signal;
- generating a second voltage in dependence on the reference signal;
- and
- combining the first and second voltages to provide a power supply voltage.
A method of generating a power supply tracking a reference signal, comprising the steps of:
- filtering, in a plurality n of filtering steps, the envelope signal, the filtering applied in each filtering step being different;
- generating, in a respective plurality n of voltage generation steps, a respective plurality of intermediate voltages in dependence on the respective filtered reference signals;
- receiving, in each of a plurality of n−1 voltage summation steps respectively associated with the 2nd to nth voltage generation steps, the intermediate voltage generated in the respective generating step;
- receiving, in each of the plurality of n−1 voltage summation steps the output of the preceding summation step;
- generating, as an output of each summation step the sum of the two inputs;
- and
- providing the output of the n−1th summation step as the supply voltage.
A method of generating a power supply tracking a reference signal, comprising the steps of:
- filtering the reference signal;
- generating an intermediate power supply signal in dependence on the filtered reference signal;
- summing the intermediate power supply signal with a correction signal to provide an output power supply signal;
- subtracting the output power supply signal from the reference signal to generate an error signal;
- and
- generating the correction signal in dependence on the error signal.
An apparatus for generating a power supply tracking a reference signal, comprising of:
- means for filtering the reference signal;
- means for generating a first voltage in dependence on the filtered reference signal;
- means for generating a second voltage in dependence on the reference signal;
- and
- means for combining the first and second voltages to provide a power supply voltage.
An arrangement for generating a power supply tracking a reference signal, comprising:
- a plurality n of voltage generation stages, each comprising:
- a filter for filtering the reference signal, wherein the bandwidth of each filter is different;
- and
- a voltage generation stage for generating an intermediate supply voltage in dependence on the filtered reference signal;
- a plurality n−1 of voltage summation stages, associated with the 2nd to nth voltage generation stages respectively, each adapted to:
- receive as a first input the intermediate supply voltage generated by the respective voltage supply generation stage;
- receive as a second input the output of the preceding summation stage;
- and
- generate as an output the sum of the first and second inputs,
- wherein the output of the n−1th summation stage is the output supply voltage.
An apparatus of generating a power supply tracking a reference signal, comprising:
- means for filtering, in a plurality n of filtering steps, the envelope signal, the filtering applied in each filtering step being different;
- means for generating, in a respective plurality n of voltage generation steps, a respective plurality of intermediate voltages in dependence on the respective filtered reference signals;
- means for receiving, in each of a plurality of n−1 voltage summation steps respectively associated with the 2nd to nth voltage generation steps, the intermediate voltage generated in the respective generating step;
- means for receiving, in each of the plurality of n−1 voltage summation steps the output of the preceding summation step;
- means for generating, as an output of each summation step the sum of the two inputs;
- and
- means for providing the output of the n−1th summation step as the supply voltage.
An arrangement for generating a power supply tracking a reference signal, comprising:
- a filter for filtering the reference signal;
- an intermediate power supply stage for generating an intermediate power supply signal in dependence on the filtered reference signal;
- a summer for summing the intermediate power supply signal with a correction signal to provide an output power supply signal;
- a subtractor for subtracting the output power supply signal from the reference signal to generate an error signal;
- and
- an amplifier for generating the correction signal in dependence on the error signal.
Dependencies are inferred from the claim text.