High frequency power amplifier module and wireless communication apparatus
First Claim
1. A high frequency power amplifier module comprising:
- an input terminal supplied with a signal to be amplified;
an output terminal;
a control terminal;
a mode switch terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal, each said amplifying stage comprising a first terminal which receives a signal inputted to said amplifying stage, a second terminal which transmits a signal outputted therefrom, a third terminal which receives a reference potential for said amplifying stage;
bias circuits which are respectively connected between said control terminal and the first terminals of said respective amplifying stages and respectively apply to the first terminals a dc bias potential based on a voltage supplied to said control terminal;
a plurality of temperature characteristic compensating circuits which respectively constitute current mirror circuits with respect to said respective amplifying stages; and
a mode switching circuit which is operated by a signal supplied to said mode switching terminal and turns on and off each said temperature characteristic compensating circuit to thereby perform switching between communication modes, wherein at least one amplifying stage, excluding the amplifying stage corresponding to a final stage of said plurality of amplifying stages, and the corresponding temperature characteristic compensating comprise a respective load-side semiconductor amplifying element a respective and ground-side semiconductor amplifying element connected in series, control terminals of the respective load-side semiconductor amplifying elements thereof are connected to one another, and a control terminal of the said ground-side semiconductor amplifying element of the respective amplifying stage is connected between resistors forming a voltage, divider of the corresponding bias circuit, an APC signal is applied to the control terminal of said load-side semiconductor amplifying element of said at least one amplifying stage in one communication mode so that the communication modes different from each other approximate each other in gain, and predetermined fixed potentials are respectively applied to the first terminals of said amplifying stages as bias potentials.
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Accused Products
Abstract
A GSM system and an EDGE system much different in gain are incorporated into a single high frequency power amplifier module.
In a high frequency power amplifier module having a multi-stage amplifying configuration, which is used in a GSM mode and an EDGE mode according to switching, a first-stage amplifier comprises a dual gate MOSFET. In the EDGE mode, an APC signal or a selected and fixed potential is supplied to a first gate electrode of the dual gate MOSFET. Further, Vgs (Vgs1, Vgs2 and Vgs3) of respective transistors of from a first stage to a third stage are fixed in potential form or supplied as APC signals, and the gain in the EDGE mode is matched with that in the GSM mode, whereby the generation of noise is reduced.
72 Citations
37 Claims
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1. A high frequency power amplifier module comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a control terminal;
a mode switch terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal, each said amplifying stage comprising a first terminal which receives a signal inputted to said amplifying stage, a second terminal which transmits a signal outputted therefrom, a third terminal which receives a reference potential for said amplifying stage;
bias circuits which are respectively connected between said control terminal and the first terminals of said respective amplifying stages and respectively apply to the first terminals a dc bias potential based on a voltage supplied to said control terminal;
a plurality of temperature characteristic compensating circuits which respectively constitute current mirror circuits with respect to said respective amplifying stages; and
a mode switching circuit which is operated by a signal supplied to said mode switching terminal and turns on and off each said temperature characteristic compensating circuit to thereby perform switching between communication modes, wherein at least one amplifying stage, excluding the amplifying stage corresponding to a final stage of said plurality of amplifying stages, and the corresponding temperature characteristic compensating comprise a respective load-side semiconductor amplifying element a respective and ground-side semiconductor amplifying element connected in series, control terminals of the respective load-side semiconductor amplifying elements thereof are connected to one another, and a control terminal of the said ground-side semiconductor amplifying element of the respective amplifying stage is connected between resistors forming a voltage, divider of the corresponding bias circuit, an APC signal is applied to the control terminal of said load-side semiconductor amplifying element of said at least one amplifying stage in one communication mode so that the communication modes different from each other approximate each other in gain, and predetermined fixed potentials are respectively applied to the first terminals of said amplifying stages as bias potentials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A high frequency power amplifier module comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a control terminal;
a mode switch terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal, each said amplifying stage comprising a first terminal which receives a signal inputted to said amplifying stage, a second terminal which transmits a signal outputted therefrom, and a third terminal which receives a reference potential for said amplifying stage;
bias circuits which are respectively connected between said control terminal and the first terminals of said respective amplifying stages and respectively apply to the first terminals a dc bias potential based on a voltage supplied to said control terminal;
a plurality of temperature characteristic compensating circuits which respectively constitute current mirror circuits with respect to said respective amplifying stages; and
a mode switching circuit which is operated by a signal supplied to said mode switching terminal and turns on and off each temperature characteristic compensating circuit to thereby perform switching between communication modes, wherein at least one amplifying stage excluding the amplifying stage corresponding to a final stage of said plurality of amplifying stages, and the corresponding temperature characteristic compensating circuit each comprise a respective load-side semiconductor amplifying element and a respective ground-side semiconductor amplifying element connected in series, control terminals of the respective load-side semiconductor amplifying elements thereof are connected to one another, and a control terminal of the ground-side semiconductor amplifying is connected between resistors forming a voltage divider of the corresponding bias circuit, an APC signal is applied to the control terminal of said load-side semiconductor amplifying element of said at least one amplifying stage in one communication mode so that the communication modes different from each other approximate each other in gain, and APC signals are respectively applied to the first terminals of said amplifying stages as bias potentials. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A high frequency power amplifier module comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a control terminal;
a mode switch terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal, each said amplifying stage comprising a first terminal which receives a signal inputted to said amplifying stage, a second terminal which transmits a signal outputted therefrom, and a third terminal which receives a reference potential for said amplifying stage;
bias circuits which are respectively connected between said control terminal and the first terminals of said respective amplifying stages and respectively apply to the first terminals a dc bias potential based on a voltage supplied to said control terminal;
a plurality of temperature characteristic compensating circuits which respectively constitute current mirror circuits with respect to said amplifying stages; and
a mode switching circuit which is operated by a signal supplied to said mode switching terminal and turns on and off each said temperature characteristic compensating circuit to thereby perform switching between communication modes, wherein at least one amplifying stage, excluding the amplifying stage corresponding to a final stage of said plurality of amplifying stages, and the corresponding temperature characteristic compensating circuit each comprise a respective load-side semiconductor amplifying elements and ground-side semiconductor amplifying element connected in series, control terminals of the respective load-side semiconductor amplifying elements thereof are connected to one another, and a control terminal of the ground-side semiconductor amplifying element of the respective amplifying stage is connected between resistors forming a voltage divider of the corresponding bias circuits, a selected and fixed potential is applied to the control terminal of said load-side semiconductor amplifying element of said at least one amplifying stage in one communication mode so that the communication modes different from each other approximate each other in gain, and predetermined fixed potentials are respectively applied to the first terminals of said amplifying stages as bias potentials. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A high frequency power amplifier module for performing a linear amplifying operation or a non-linear amplifying operation according to a communication mode signal, comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a mode switch terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal and having first terminals for respectively receiving input signals supplied to said amplifying stages, and second terminals for respectively sending out signals outputted from said amplifying stages;
bias circuits which are respectively connected to the first terminals of said respective amplifying stages and apply bias potentials to the first terminals; and
a mode switching circuit which forms a mode signal according to a communication mode signal supplied to said mode switch terminal;
wherein at least one amplifying stage of said plurality of amplifying stages includes first and second semiconductor amplifying elements series-connected to one another between the second terminal of said amplifying stage and a predetermined voltage, the first terminal of said amplifying stage is connected to a control input node of the second semiconductor amplifying element, and the second terminal thereof is connected to an output node of the first semiconductor amplifying element, the mode signal is supplied to the control input node of the first semiconductor amplifying element, and when the linear amplifying operation and the non-linear amplifying operation are performed, gain is controlled by the mode signal. - View Dependent Claims (28, 29, 30, 31)
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32. A high frequency power amplifier module comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a mode terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal and having first terminals for respectively receiving input signals supplied to said amplifying stages, and second terminals for respectively sending out signals outputted from said amplifying stages;
bias circuits which supply bias potentials to said respective amplifying stages respectively; and
a mode circuit which forms an AGC signal according to a signal supplied to said mode terminal;
wherein at least one of said amplifying stages has first and second semiconductor amplifying elements series-connected to one another between the second terminal of said amplifying stage and a predetermined voltage, and a control terminal of the first semiconductor amplifying element is supplied with the AGC signal, an output terminal of the first semiconductor amplifying element is connected to the corresponding second terminal, and a control terminal of the second semiconductor amplifying element is connected to the corresponding first terminal. - View Dependent Claims (33, 34)
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35. A high frequency power amplifier module comprising:
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an input terminal supplied with a signal to be amplified;
an output terminal;
a mode terminal;
a plurality of amplifying stages cascade-connected between said input terminal and said output terminal and having first terminals for respectively receiving input signals supplied to said amplifying stages, and second terminals for respectively sending out signals outputted from said amplifying stages;
bias circuits which supply bias potentials to said respective amplifying stages respectively; and
a mode circuit which forms an APC signal according to a signal supplied to said mode terminal;
wherein at least one of said amplifying stages has first and second semiconductor amplifying elements series-connected to one another between the second terminal of said amplifying stage and a predetermined voltage, and a control terminal of the first semiconductor amplifying element is supplied with the APC signal, a control terminal of the second semiconductor amplifying element is connected to the corresponding first terminal and an output terminal of the first semiconductor amplifying element is connected to the corresponding second terminal. - View Dependent Claims (36, 37)
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Specification