EFFICIENT WIDEBAND ENVELOPE TRACKING POWER AMPLIFIER
First Claim
1. A wideband envelope tracking power amplifier comprising:
- a plurality of low dropout voltage regulators (LDOs) including at least a first LDO and a second LDO;
a single-input-multi-output (SIMO) voltage supply configured to;
output a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and one or more voltage levels lower than the highest voltage level, wherein each of plurality of voltage signals is switchably connected to at least one of the first LDO or second LDO;
connect the first LDO to a first voltage at a first voltage level to form at least a portion of an envelope tracking voltage level signal, the first voltage signal is one of the plurality of voltage signals; and
connect the second LDO to at least one of (i) the first voltage signal or (ii) a second of the plurality of voltage signals at a second voltage level less than the first voltage level to form at least another portion of the envelope tracking voltage level signal, the second voltage signal selected from the plurality of voltage signals based on a desired output voltage level.
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Accused Products
Abstract
A wideband envelope tracking power amplifier includes a plurality of low dropout voltage regulators (LDOs) including at least a first LDO and a second LDO. The wideband envelope tracking power amplifier also includes a single-input-multi-output (SIMO) voltage supply to output a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and one or more voltage levels lower than the highest voltage level. The SIMO voltage supply connects a first of the plurality of voltage signals at a first voltage level to the first LDO to form at least a portion of an envelope tracking voltage level signal, and connects a second of the plurality of voltage signals at a second voltage level less than or equal to the first voltage level to the second LDO to form at least another portion of the envelope tracking voltage level signal.
11 Citations
30 Claims
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1. A wideband envelope tracking power amplifier comprising:
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a plurality of low dropout voltage regulators (LDOs) including at least a first LDO and a second LDO; a single-input-multi-output (SIMO) voltage supply configured to; output a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and one or more voltage levels lower than the highest voltage level, wherein each of plurality of voltage signals is switchably connected to at least one of the first LDO or second LDO; connect the first LDO to a first voltage at a first voltage level to form at least a portion of an envelope tracking voltage level signal, the first voltage signal is one of the plurality of voltage signals; and connect the second LDO to at least one of (i) the first voltage signal or (ii) a second of the plurality of voltage signals at a second voltage level less than the first voltage level to form at least another portion of the envelope tracking voltage level signal, the second voltage signal selected from the plurality of voltage signals based on a desired output voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wideband envelope tracking power amplifier comprising:
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a plurality of low dropout voltage regulators (LDOs) including at least a first LDO and a second LDO; a single-input-multi-output (SIMO) voltage supply configured to; output a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and a plurality of voltage levels lower than the highest voltage level, wherein each of the plurality of voltage signals is switchably connected to at least one of the first LDO or second LDO, and wherein the first LDO receives a first voltage signal of the plurality of voltage signals at a first voltage level, the first voltage level comprising the highest voltage level; and connect the second LDO to at least one of (i) the first voltage signal or (ii) a second of the plurality of voltage signals at a second voltage level, the second voltage level being less than the first voltage level, the second voltage signal selected from the plurality of voltage signals based on a desired output voltage level; and a combiner configured to combine output voltage levels of the first LDO and the second LDO to form an envelope tracking voltage level signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for operating a wideband envelope tracking power amplifier, the method comprising:
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outputting a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and one or more voltage levels lower than the highest voltage level, each of the plurality of voltage signals switchably connectable to at least one of the first LDO or second LDO; connecting a first voltage signal at a first voltage level to a first low dropout voltage regulator (LDO), the first voltage signal is one of the plurality of voltage signals; connecting a second of the plurality of voltage signals at a second voltage level to a second LDO, the second voltage level being less than or equal to the highest voltage level, the second voltage signal selected from the plurality of voltage signals based on a desired output voltage level; and combining output voltage levels of the first LDO and the second LDO to form an envelope tracking voltage level signal. - View Dependent Claims (23, 24, 25, 26)
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27. A wideband envelope tracking power amplifier comprising:
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a means for outputting a plurality of voltage signals at different voltage levels, the voltage levels including a highest voltage level and a plurality of voltage levels lower than the highest voltage level, each of the plurality of voltage signals switchably connectable to at least one of the first LDO or second LDO; a means for connecting a first voltage signal at a first voltage level to a first low dropout voltage regulator (LDO), the first voltage signal I one of the plurality of voltage signals, and for connecting a second of the plurality of voltage signals at a second voltage level less than or equal to the highest voltage level to a second LDO, the second voltage signal selected from the plurality of voltage signals based on a desired output voltage level; and a means for combining output voltage levels of the first LDO and the second LDO to form an envelope tracking voltage level signal. - View Dependent Claims (28, 29, 30)
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Specification