Modulation circuit device, modulation method and radio communication device
First Claim
1. A modulation circuit device, comprising:
- an angle modulator of angle-modulating a phase signal to be inputted;
waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value, and/or (2) when the magnitude of said amplitude signal to be inputted becomes larger than said second prescribed value which is larger than said first prescribed value, the waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes large becomes said second prescribed value; and
an amplitude modulator of amplitude-modulating the signal from the output of said angle modulator by the signal of the output of said waveform shaping means.
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Accused Products
Abstract
The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes small becomes the first prescribed value; and/ or (2) the waveform shaping means in which, when the magnitude of the amplitude signal to be inputted becomes larger than the second prescribed value which is larger than the first prescribed value, the waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes larger becomes the second prescribed value; and an amplitude modulator for amplitude modulating the signal of the output of the angle modulator by the signal of the output of the waveform shaping means.
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Citations
23 Claims
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1. A modulation circuit device, comprising:
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an angle modulator of angle-modulating a phase signal to be inputted;
waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value, and/or (2) when the magnitude of said amplitude signal to be inputted becomes larger than said second prescribed value which is larger than said first prescribed value, the waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes large becomes said second prescribed value; and
an amplitude modulator of amplitude-modulating the signal from the output of said angle modulator by the signal of the output of said waveform shaping means. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21, 22, 23)
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2. A modulation circuit device, comprising:
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an angle modulator of angle-modulating a phase signal to be inputted;
a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value, and/or (2) when the magnitude of said amplitude signal to be inputted becomes larger than said second prescribed value which is larger than said first prescribed value, the waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes larger becomes said second prescribed value;
a direct current voltage supply circuit of supplying a direct current voltage;
a first amplitude modulator which operates on either of the operation modes of a first operation mode for amplifying the signal from the output of said angle modulator and a second operation mode for amplitude modulating the signal of the output of said angle modulator by the signal of the output of said waveform shaping means; and
a second amplitude modulator which operates on either of the operation modes of a first operation mode for amplifying the output of said first amplitude modulator and a second operation mode for amplitude-modulating the signal of the output of said first amplitude modulator by the signal of the output of said waveform shaping means;
wherein, when an output is made larger than a prescribed value by an output power, said first amplitude modulator is operated on said first operation mode with the signal from the output of said direct current voltage supply circuit controlled to be inputted, and said second amplitude modulator is operated on the second operation mode with the signal of the output of said waveform shaping means controlled to be inputted, wherein, when an output is made by an output power smaller than a prescribed value, said first amplitude modulator is operated on said second operation mode with the signal from the output of said waveform shaping means controlled to be inputted, and said second amplitude modulator is operated on the first operation mode with the signal of the output of said direct current voltage supply circuit controlled to be inputted. - View Dependent Claims (4)
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3. A modulation circuit device, comprising:
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an angle modulator of angle-modulating a phase signal to be inputted;
waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value, and/or (2) when the magnitude of said amplitude signal to be inputted becomes larger than said first prescribed value which is larger than said second prescribed value, the waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes larger becomes said second prescribed threshold value;
a direct current voltage supply circuit of supplying a direct current voltage;
a first amplitude modulator which operates on either of the operation modes of a first operation mode for amplifying the signal from the output of said angle modulator and a second operation mode for amplitude-modulating the signal of the output of said angle modulator by the signal of the output of said waveform shaping means; and
a second amplitude modulator of amplitude-modulating the signal of the output of said first amplitude modulator by the signal of the output of said waveform shaping means;
wherein, when an output is made larger than a prescribed value by an output power, said first amplitude modulator is operated on said first operation mode with the signal from the output of said direct current voltage supply circuit controlled to be inputted, and said second amplitude-modulator amplitude modulates the signal of the output of said first amplitude modulator by the signal of the output of said waveform shaping means with the signal of the output of said waveform shaping means controlled to be inputted, and the signal of the output of said second amplitude modulator is outputted outside, wherein, when an output is made smaller than a prescribed value by an output power, said first amplitude modulator is operated on the second operation mode with the signal from the output of said waveform shaping means controlled to be inputted, and the signal of the output of said first amplitude modulator is outputted outside.
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18. (Currently Amended) A modulation method, comprising:
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an angle modulation step of angle modulating a phase signal to be inputted;
a waveform shaping step of shaping a waveform of an amplitude signal in which, (1) when the magnitude of said amplitude signal to be inputted becomes smaller than said first prescribed value, the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value,(2)and/or when the magnitude of said amplitude signal to be inputted becomes larger than a second prescribed value which is larger than a first prescribed value, the magnitude of said amplitude signal of the portion which becomes large becomes said second prescribed value; and
an amplitude modulation step of amplitude-modulating the angle modulated phase signal by the shaped waveform amplitude signal.
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19. A modulation method, comprising:
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an angle modulation step of angle modulating a phase signal to be inputted by an angle modulator, a waveform shaping step, in which (1), when the magnitude of an amplitude signal to be inputted becomes smaller than the first prescribed value, the waveform of said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value,(2)and/or when the magnitude of said amplitude signal to be inputted becomes larger than a second prescribed value which is larger than a first prescribed value, the waveform of the said amplitude signal is shaped so that the magnitude of said amplitude signal of the portion which becomes large becomes said second prescribed value;
a direct current voltage supply step of supplying a direct current voltage by a direct current voltage supply circuit;
a first amplitude modulation step which operates a first amplitude modulator on either of the operation modes of a first operation mode for amplifying the signal from the output of said angle modulator or a second operation mode for amplitude modulating the signal of the output of said angle modulator by the signal of the output of said waveform shaping means; and
a second amplitude modulation step which operates a second amplitude modulator on either of the operation modes of a first operation mode for amplifying the signal from the output of said first amplitude modulator or a second operation mode for amplitude modulating the signal of the output of said first amplitude modulator by the signal of the output of said waveform shaping means;
wherein, when an output is made larger than a prescribed value by an output power, said first amplitude modulator is operated on said first operation mode with the signal from the output of said direct current voltage supply circuit controlled to be inputted, and said second amplitude modulator is operated on the second operation mode with the signal of the output of said waveform shaping means controlled to be inputted, wherein, when an output is made smaller than a prescribed value by an output power, said first amplitude modulator is operated on said second operation mode with the signal from the output of said waveform shaping means controlled to be inputted, and said second amplitude modulator is operated on the first operation mode with the signal of the output of said direct current voltage supply circuit controlled to be inputted.
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20. A modulation method, comprising:
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an angle modulation step of angle-modulating a phase signal to be inputted by an angle modulator;
a waveform shaping step, in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than said first prescribed value, the waveform of said amplitude signal is shaped by the waveform shaping means so that the magnitude of said amplitude signal of the portion which becomes small becomes said first prescribed value,(2)and/or, when the magnitude of said amplitude signal to be inputted becomes larger than a second prescribed value which is larger than a first prescribed value, the waveform of said amplitude signal is shaped shaping so that said amplitude signal of the portion which becomes large becomes said second prescribed value;
a direct current voltage supply step of supplying a direct current voltage by a direct current supply circuit;
a first amplitude modulation step which operates a first amplitude modulator on either of the operation modes of a first operation mode for amplifying the signal from the output of said angle modulator or a second operation mode for amplitude modulating the signal of the output of said waveform shaping means by the signal of the output of said waveform shaping means; and
a second amplitude modulation step which causes a second amplitude modulator to amplitude modulate the signal of the output of said first amplitude modulator by the signal of the output of said waveform shaping means, wherein, when an output is made larger than a prescribed value by an output power, said first amplitude modulator is operated on said first operation mode with the signal from the output of said direct current voltage supply circuit controlled to be inputted, and said second amplitude modulator is controlled to be inputted with the signal of the output of said waveform shaping means, so that the signal from the output of said first amplitude modulator is amplitude-modulated by the signal of the output of said waveform shaping means, and the signal of the output of said second amplitude modulator is outputted outside, wherein, when an output is made smaller than a prescribed value by an output power, said first amplitude modulator is operated on said second operation mode with the signal from the output of said waveform shaping means controlled to be inputted, and the signal of the output of said first amplitude modulator is outputted outside.
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Specification