High frequency power amplifying circuit, and mobile communication apparatus using it
First Claim
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1. A high frequency power amplifying circuit comprising:
- a first amplifying element;
a second amplifying element of the same structure as said first amplifying element, an element size of said second amplifying element being 1/M of said first amplifying element; and
a power control circuit supplying an identical bias voltage to said first amplifying element and said second amplifying element, wherein a power output of said first amplifying element is judged based on an output current from an output terminal of said second amplifying element.
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Abstract
A high frequency power amplifying circuit in which a first amplifying element and a second amplifying element of the same structure as the above first amplifying element and being reduced to 1/M in element size are used, the above first amplifying element and the second amplifying element are supplied with the same bias voltage from a power control circuit, and the power output of the above first amplifying element is judged based on the output current outputted from the output terminal of the above second amplifying element.
53 Citations
15 Claims
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1. A high frequency power amplifying circuit comprising:
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a first amplifying element;
a second amplifying element of the same structure as said first amplifying element, an element size of said second amplifying element being 1/M of said first amplifying element; and
a power control circuit supplying an identical bias voltage to said first amplifying element and said second amplifying element, wherein a power output of said first amplifying element is judged based on an output current from an output terminal of said second amplifying element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mobile communication apparatus-comprising:
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a high frequency power amplifying circuit including a first amplifying element, a second amplifying element of the same structure as said first amplifying element, an element size of said second amplifying element being 1/M of said first amplifying element, and a power control circuit supplying an identical bias voltage to said first amplifying element and said second amplifying element, wherein a power output of said first amplifying element is judged based on an output current from an output terminal of said second amplifying element;
a control circuit supplying an output power control instruction to said power control circuit based on a control signal included in a signal received from a base station; and
a rechargeable battery supplying an operation voltage to an electric circuit including said high frequency power amplifying circuit and said control circuit. - View Dependent Claims (15)
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Specification