Efficient power amplification system

• US 7,345,534 B2
• Filed: 05/31/2005
• Issued: 03/18/2008
• Est. Priority Date: 05/31/2005
• Status: Expired due to Fees

• Current Assignee: North South Holdings Incorporated (Spherix Incorporated)
• Original Assignee: M/A-Com Eurotec BV (TE Connectivity Limited)
• Inventors: Grebennikov, Andrei
• Primary Examiner(s): Pascal; Robert
• Assistant Examiner(s): Nguyen; Hieu
• Application Number:
  US11/141,796
• Publication Number:
  US 20060267682A1
• Time in Patent Office: 1,022 Days
• Field of Search: 330/51, 330/124.R, 330/310
• US Class Current: 330/51
• CPC Class Codes: H03F 1/0277 Selecting one or more amplifiers from a plurality of amplifiers
• CPC Class Codes: H03F 2203/7221 the gated amplifier being switched on or off by a switch at the output of the amplifier
• CPC Class Codes: H03F 2203/7236 the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
• CPC Class Codes: H03F 3/72 Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal

Abstract

A system for efficient power amplification of an electromagnetic signal includes a switchplexer having at least two inputs and an output. The switchplexer may be configured to provide communication between a selected switchplexer input and the switchplexer output. The system also may include two or more amplifier stages, each having an input and an output, and one or more output matching circuits. Each of the output matching circuits may include an input in communication with one of the amplifier stage outputs, as well as an output in communication with one of the switchplexer inputs. A control unit may be configured to control selection of the selected switchplexer input and to selectively activate at least one of the amplifier stages.

Claims

1. A system for efficient power amplification of an electromagnetic signal, comprising:

a switchplexer having at least two switchplexer inputs and a switchplexer output, where the switchplexer is configured to provide communication between a selected switchplexer input and the switchplexer output;

at least one interstage matching circuit;

at least two amplifier stages, each having an amplifier stage input and an amplifier stage output, where the amplifier stage output of a first one of the amplifier stages is in communication with a first one of the switchplexer inputs via the at least one interstage matching circuit;

at least one output matching circuit, each having

an output matching circuit input in communication with a second one of the amplifier stage outputs, and

an output matching stage output in communication with a second one of the switchplexer inputs; and

a control unit configured to control selection of the selected switchplexer input and to selectively activate at least one of the amplifier stages.

2. A system for efficient power amplification of an electromagnetic signal as in claim 1, where the switchplexer is configured to receive a first matched power output from the first amplifier stage output and the switchplexer is further configured to receive a second matched power output from the output matching stage output, where the first matched power output has a power level that is different from a power level of the second matched power output.

3. A system for efficient power amplification of an electromagnetic signal as in claim 1, where each of the switchplexer inputs is provided with one of a plurality of power signals, each having a different power output level.

4. A system for efficient power amplification of an electromagnetic signal as in claim 1, where each of the output matching circuits is configured to provide impedance matching within a frequency range of about 824-915 MHz.

5. A system for efficient power amplification of an electromagnetic signal as in claim 1, where each of the output matching circuits is configured to provide impedance matching within a frequency range of about 1710-1910 MHz.

6. A system for efficient power amplification of an electromagnetic signal as in claim 1, where each of the amplifier stages includes a transistor.

7. A system for efficient power amplification of an electromagnetic signal as in claim 1, where the at least one interstage matching circuit includes:

an interstage matching circuit input in communication with one of the amplifier stage outputs,

an interstage matching circuit main output in communication with one of the amplifier stage inputs, and

an interstage matching circuit bypass output in communication with a respective one of the switchplexer inputs.

8. A system for efficient power amplification of an electromagnetic signal as in claim 7, where the at least two amplifier stages and the at least one interstage matching circuit are contained in a single integrated circuit.

9. A system for efficient power amplification of an electromagnetic signal as in claim 7, where the at least one interstage matching circuit further comprises at least two lumped elements.

10. A system for efficient power amplification of an electromagnetic signal as in claim 7, where the at least one interstage matching circuit further comprises at least two transmission lines.

11. A system for efficient power amplification of an electromagnetic signal as in claim 7, where:

the at least one interstage matching circuit includes a first interstage matching circuit;

the input of the first interstage matching circuit is connected to the main output of the first interstage matching circuit via a circuit including at least one capacitor and at least one transmission line; and

the input of the first interstage matching circuit is connected to the bypass output of the first interstage matching circuit via a transmission line.

12. A system for efficient power amplification of an electromagnetic signal as in claim 7, where:

the at least one interstage matching circuit includes a first interstage matching circuit, where the input of the first interstage matching circuit is in communication with the output of the first amplifier stage, and where the main output of the first interstage matching circuit is in communication with the input of the second amplifier stage; and

the at least one output matching stage includes a first output matching stage, where the output of the second amplifier stage is in communication with the input of the first output matching stage.

13. A system for efficient power amplification of an electromagnetic signal as in claim 1, where the at least two amplifier stages includes a first low-band amplifier stage, a second low-band amplifier stage, a first high-band amplifier stage, and a second high-band amplifier stage, the system further comprising:

a band diplexer having a first band diplexer input, a second band diplexer input, and a band diplexer output that is in communication with one of the switchplexer inputs;

where the at least one interstage matching circuit includes a low-band interstage matching circuit and a high-band interstage matching circuit;

where the low-band interstage matching circuit includes;

a low-band interstage matching circuit input in communication with the output of the first low-band amplifier stage,

a low-band interstage matching circuit main output in communication with the input of the second low-band amplifier stage, and

a low-band interstage matching circuit bypass output in communication with the first band diplexer input; and

where the high-band interstage matching circuit includes;

a high-band interstage matching circuit input in communication with the output of the first high-band amplifier stage,

a high-band interstage matching circuit main output in communication with the input of the second high-band amplifier stage, and

a high-band interstage matching circuit bypass output in communication with the second band diplexer input.

14. A system for efficient power amplification of an electromagnetic signal as in claim 13, where the band diplexer further comprises at least two lumped elements.

15. A system for efficient power amplification of an electromagnetic signal as in claim 13, where the band diplexer further comprises at least two transmission lines.

16. A system for efficient power amplification of an electromagnetic signal as in claim 13, where:

the low band interstage matching circuit is configured to provide impedance matching within a frequency range of approximately 824-915 MHz; and

the high band interstage matching circuit is configured to provide impedance matching within a frequency range of approximately 1710-1910 MHz.

17. A system for efficient power amplification of an electromagnetic signal, comprising:

a switchplexer having at least two switchplexer inputs and a switchplexer output, where the switchplexer is configured to provide communication between a selected switchplexer input and the switchplexer output;

at least two amplifier stages, each having an amplifier stage input and an amplifier stage output;

an interstage matching circuit, having

an interstage matching circuit input in communication with the amplifier stage output of a second one of the amplifier stages,

an interstage matching circuit main output in communication with the amplifier stage input of the first one of the amplifier stages, and

an interstage matching circuit bypass output in communication with a first one of the switchplexer inputs;

at least one output matching circuit, each having

an output matching circuit input in communication with the amplifier stage output of the first one of the amplifier stages, and

an output matching stage output in communication with a second one of the switchplexer inputs; and

a control unit configured to control selection of the selected switchplexer input and to selectively activate at least one of the amplifier stages.

18. A system for efficient power amplification of an electromagnetic signal as in claim 17, where the switchplexer is configured to receive a first matched power output from the interstage matching circuit bypass output and the switchplexer is further configured to receive a second matched power output from the output matching stage output, where the first matched power output has a power level that is different from a power level of the second matched power output.

19. A system for efficient power amplification of an electromagnetic signal, comprising:

a switchplexer having at least two switchplexer inputs and a switchplexer output, where the switchplexer is configured to provide communication between a selected switchplexer input and the switchplexer output;

at least two low-band amplifier stages, each having an amplifier stage input and an amplifier stage output;

at least two high-band amplifier stages, each having an amplifier stage input and an amplifier stage output;

a band diplexer having a first band diplexer input, a second band diplexer input, and a band diplexer output that is in communication with a first one of the switchplexer inputs;

a low-band interstage matching circuit having

a low-band interstage matching circuit input in communication with the output of a first one of the low-band amplifier stages,

a low-band interstage matching circuit main output in communication with the input of a second one of the low-band amplifier stages, and

a low-band interstage matching circuit bypass output in communication with the first band diplexer input; and

a high-band interstage matching circuit having

a high-band interstage matching circuit input in communication with the output of a first one of the high-band amplifier stages,

a high-band interstage matching circuit main output in communication with the input of a second one of the high-band amplifier stages, and

a high-band interstage matching circuit bypass output in communication with the second band diplexer input;

a low-band output matching circuit, having

an output matching circuit input in communication with the output of the second low-band amplifier stage output, and

an output matching stage output in communication with a second one of the switchplexer inputs;

a high-band output matching circuit, having

an output matching circuit input in communication with the output of the second high-band amplifier stage output, and

an output matching stage output in communication with a third one of the switchplexer inputs; and

a control unit configured to control selection of the selected switchplexer input and to selectively activate at least one of the amplifier stages.

20. A system for efficient power amplification of an electromagnetic signal as in claim 19, where:

the low band interstage matching circuit and the low-band output matching circuit are configured to provide impedance matching within a frequency range of about 824-915 MHz; and

the high band interstage matching circuit and the high-band output matching circuit are configured to provide impedance matching within a frequency range of about 1710-1910 MHz.