Amplifying apparatus
First Claim
Patent Images
1. An amplifying apparatus comprising:
- a Doherty amplifying circuit comprising a first amplifier having a first circuit constant determined so as to satisfy a condition for E-class operation, and a second amplifier having a second circuit constant determined so as to satisfy a condition for E-class operation, the second amplifier being activated, when an input signal into the first amplifier has a power equal to or larger than a specified value, to amplify the input signal;
a combining unit which combines outputs from the first amplifier and the second amplifier;
power detecting unit which detects an output power from the combining unit; and
controlling unit which controls at least the first circuit constant in accordance with the output power detected by the power detecting unit such that an amplifying efficiency of the Doherty amplifying circuit is not reduced.
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Abstract
The amplifying apparatus includes an amplifier having a circuit constant determined so as to satisfy a condition for E-class operation; power detecting unit which detects an output electricity from the amplifier; and controlling unit which controls the circuit constant in accordance with the output power detected by the power detecting unit.
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Citations
11 Claims
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1. An amplifying apparatus comprising:
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a Doherty amplifying circuit comprising a first amplifier having a first circuit constant determined so as to satisfy a condition for E-class operation, and a second amplifier having a second circuit constant determined so as to satisfy a condition for E-class operation, the second amplifier being activated, when an input signal into the first amplifier has a power equal to or larger than a specified value, to amplify the input signal; a combining unit which combines outputs from the first amplifier and the second amplifier; power detecting unit which detects an output power from the combining unit; and controlling unit which controls at least the first circuit constant in accordance with the output power detected by the power detecting unit such that an amplifying efficiency of the Doherty amplifying circuit is not reduced. - View Dependent Claims (3, 4, 5)
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2. An amplifying apparatus comprising:
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a Doherty amplifying circuit comprising a first amplifier having a first circuit constant determined so as to satisfy a condition for E-class operation, and a second amplifier having a second circuit constant determined so as to satisfy a condition for E-class operation, the second amplifier being activated, when an input signal into the first amplifier has a power larger than a specified value, to amplify the input signal; a combining unit which combines outputs from the first amplifier and the second amplifier; power detecting unit which detects an output power from the first amplifier; and controlling unit which controls at least the first circuit constant in accordance with the output power detected by the power detecting unit such that an amplifying efficiency of the Doherty amplifying circuit is not reduced. - View Dependent Claims (6, 10)
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7. An amplifying apparatus comprising:
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a Doherty amplifying circuit comprising a first amplifier having a first circuit constant determined so as to satisfy a condition for E-class operation, and a second amplifier having a second circuit constant determined so as to satisfy a condition for E-class operation, the second amplifier being activated, when an input signal into the first amplifier has a power larger equal to or than a specified value, to amplify the input signal; a combining unit which combines outputs from the first amplifier and the second amplifier; first power detecting unit which detects a first output power from the first amplifier; second power detecting unit which detects a second output power from the second amplifier; and first controlling unit which controls the first circuit constant in accordance with the first output power detected by the first power detecting unit such that an amplifying efficiency of the Doherty amplifying circuit is not reduced; and second controlling unit which controls the second circuit constant in accordance with the second output power detected by the second power detecting unit such that an amplifying efficiency of the Doherty amplifying circuit is not reduced. - View Dependent Claims (8, 9)
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11. A method for controlling a Doherty amplifying circuit comprising a first amplifier having a first circuit constant determined so as to satisfy a condition for E-class operation, and a second amplifier having a second circuit constant determined so as to satisfy a condition for E-class operation, the second amplifier being activated, when an input signal into the first amplifier has a power equal to or larger than a specified value, to amplify the input signal, said method comprising:
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coupling outputs from the first amplifier and the second amplifier; detecting an output power obtained by the coupling; and controlling at least the first circuit constant in accordance with the output power detected such that an amplifying efficiency of the Doherty amplifying circuit is not reduced.
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Specification