CN104935265A - Bidirectional amplifier circuit based on TDD working mode - Google Patents
Bidirectional amplifier circuit based on TDD working mode Download PDFInfo
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- CN104935265A CN104935265A CN201510318691.4A CN201510318691A CN104935265A CN 104935265 A CN104935265 A CN 104935265A CN 201510318691 A CN201510318691 A CN 201510318691A CN 104935265 A CN104935265 A CN 104935265A
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Abstract
The invention discloses a bidirectional amplifier circuit based on a TDD working mode. The circuit comprises a circulator, an uplink circuit and a downlink circuit, wherein a first output terminal of the downlink circuit is connected with a first input terminal of the circulator; and a second output terminal of the circulator is connected with a second input terminal of the uplink circuit. The uplink circuit comprises a switching circuit, a low noise amplifier, a first gain amplifier and a second gain amplifier. The downlink circuit comprises a voltage control attenuator, a power drive-stage amplifier and a power amplifier. The bidirectional amplifier circuit based on the TDD working mode provided by the invention has the following beneficial effects that: the bidirectional circuit protects one unidirectional circuit and a device and satisfies the output requirements of low noise and linear high power, thereby realizing the steady operation of the circuit.
Description
Technical field
The present invention relates to the communications field, more particularly, relate to a kind of bi-directional amplifier circuit based on TDD mode of operation.
Background technology
Although the signal madulation mode that various communication system adopts is not quite similar, from the duplex communication mode adopted, have tdd mode and fdd mode point.In tdd mode, the power amplifier that base station uses not only needs output high-power, and must not damage the function of low-noise reception circuit.Current use tdd mode amplifier, the general switch operating adopting integrated single-pole double-throw switch (SPDT) to carry out transmission circuit, also has and adopts passive ferrite toroidal device to make transceiver insulation circuit to meet the switching of mode of operation.The former circuit is simple, but due to semiconductor module Power Limitation, can only export very little linear power, can not meet the output high power requirements of base station; The ferrite toroidal device that the latter adopts makes the high-power of output directly receive transmitting antenna, and reliability is higher, and linear index is good, power capacity is large, but because the isolation of itself is limited, low noise amplifier directly connects circulator, low noise amplifier can be caused to damage.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of bi-directional amplifier circuit based on TDD mode of operation, in order to realize the high power amplifier of TDD mode of operation, signal is more stably worked.
The present invention solves the problems of the technologies described above, and provide the following technical scheme solved: a kind of bi-directional amplifier circuit based on TDD mode of operation, this circuit comprises circulator, upstream circuitry and downstream circuitry; First output of described downstream circuitry is connected with the first input end of circulator, and the second output of described circulator is connected with the second input of upstream circuitry.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described upstream circuitry comprises switching circuit, low noise amplifier, the first gain amplifier and the second gain amplifier; The side of described switching circuit is connected with the input of low noise amplifier, the output of described low noise amplifier is connected with the input of the first gain amplifier, and the output of described first gain amplifier is connected with the input of the second gain amplifier.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, the opposite side of described switching circuit is connected with the output of circulator.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described switching circuit is protective circuit, for avoiding the zero load of downstream circuitry output, thus protects circulator and upstream circuitry further.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described downstream circuitry comprises voltage-controlled attenuator, power amplifier driving stage amplifier and power amplifier; The output of described voltage-controlled attenuator is connected with the input of power amplifier driving stage amplifier, and the output of described power amplifier driving stage amplifier is connected with the input of power amplifier.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, the output of described power amplifier is connected with the input of circulator.
Implement the bi-directional amplifier circuit based on TDD mode of operation of the present invention; there is following beneficial effect: two-way circuit realizes wherein an one-way circuit and device are protected; and meet the requirement of low noise and linear high-power output, the steady operation of realizing circuit.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the bi-directional amplifier circuit based on TDD mode of operation of the present invention;
1, voltage-controlled attenuator, 2, power amplifier driving stage amplifier, 3, power amplifier, 4, circulator, 5, switching circuit, 6, low noise amplifier, the 7, first gain amplifier, the 8, second gain amplifier.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, be the structural representation of the bi-directional amplifier circuit based on TDD mode of operation of the present invention; Based on a bi-directional amplifier circuit for TDD mode of operation, this circuit comprises circulator, upstream circuitry and downstream circuitry; First output of described downstream circuitry is connected with the first input end of circulator, and the second output of described circulator is connected with the second input of upstream circuitry.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described upstream circuitry comprises switching circuit, low noise amplifier, the first gain amplifier and the second gain amplifier; The side of described switching circuit is connected with the input of low noise amplifier, the output of described low noise amplifier is connected with the input of the first gain amplifier, and the output of described first gain amplifier is connected with the input of the second gain amplifier.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, the opposite side of described switching circuit is connected with the output of circulator.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described switching circuit is protective circuit, for avoiding the zero load of downstream circuitry output, thus protects circulator and upstream circuitry further.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, described downstream circuitry comprises voltage-controlled attenuator, power amplifier driving stage amplifier and power amplifier; The output of described voltage-controlled attenuator is connected with the input of power amplifier driving stage amplifier, and the output of described power amplifier driving stage amplifier is connected with the input of power amplifier.
In the bi-directional amplifier circuit based on TDD mode of operation of the present invention, the output of described power amplifier is connected with the input of circulator.
Operation principle of the present invention: the magnitude of voltage of this signal is amplified to required signal level RX_OUT output output by the first gain amplifier, the second gain amplifier by switching circuit successively by the signal of described upstream circuitry after circulator after low noise amplifier amplifies, again.
Described downstream circuitry by decaying to the noise signal of signal after the signal input of TX_IN input after voltage-controlled attenuator, described power amplifier driving stage amplifier carries out power amplification to this signal, outputs signal through circulator finally by after power amplifier amplifying signal.
The device of up-downgoing opens and closes work by control signal SWT2, SWR2, ALC, TC and PA2_EN.Upper reception and under be emitted through circulator and be connected to ANT_MS port.
Compared with prior art; implement the bi-directional amplifier circuit based on TDD mode of operation of the present invention; there is following beneficial effect: two-way circuit realizes protecting wherein an one-way circuit and device, and meets the requirement of low noise and linear high-power output, the steady operation of realizing circuit.
The above embodiment only have expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (6)
1. based on a bi-directional amplifier circuit for TDD mode of operation, it is characterized in that, this circuit comprises circulator, upstream circuitry and downstream circuitry; First output of described downstream circuitry is connected with the first input end of circulator, and the second output of described circulator is connected with the second input of upstream circuitry.
2. the bi-directional amplifier circuit based on TDD mode of operation according to claim 1, is characterized in that, described upstream circuitry comprises switching circuit, low noise amplifier, the first gain amplifier and the second gain amplifier; The side of described switching circuit is connected with the input of low noise amplifier, the output of described low noise amplifier is connected with the input of the first gain amplifier, and the output of described first gain amplifier is connected with the input of the second gain amplifier.
3. the bi-directional amplifier circuit based on TDD mode of operation according to claim 2, is characterized in that, the opposite side of described switching circuit is connected with the output of circulator.
4. the bi-directional amplifier circuit based on TDD mode of operation according to Claims 2 or 3, is characterized in that, described switching circuit is protective circuit, for avoiding the zero load of downstream circuitry output, thus protects circulator and upstream circuitry further.
5. the bi-directional amplifier circuit based on TDD mode of operation according to claim 1, is characterized in that, described downstream circuitry comprises voltage-controlled attenuator, power amplifier driving stage amplifier and power amplifier; The output of described voltage-controlled attenuator is connected with the input of power amplifier driving stage amplifier, and the output of described power amplifier driving stage amplifier is connected with the input of power amplifier.
6. the bi-directional amplifier circuit based on TDD mode of operation according to claim 1, is characterized in that, the output of described power amplifier is connected with the input of circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318691.4A CN104935265A (en) | 2015-06-10 | 2015-06-10 | Bidirectional amplifier circuit based on TDD working mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318691.4A CN104935265A (en) | 2015-06-10 | 2015-06-10 | Bidirectional amplifier circuit based on TDD working mode |
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| Publication Number | Publication Date |
|---|---|
| CN104935265A true CN104935265A (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510318691.4A Pending CN104935265A (en) | 2015-06-10 | 2015-06-10 | Bidirectional amplifier circuit based on TDD working mode |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020193067A1 (en) * | 2001-04-26 | 2002-12-19 | Cowley Nicholas Paul | Radio frequency interface |
| CN101599744A (en) * | 2008-06-04 | 2009-12-09 | 上海电盈通信技术有限公司 | The high-power bilateral amplifier of tdd mode |
| CN202503478U (en) * | 2012-02-23 | 2012-10-24 | 北京琅拓科电子设备有限公司 | Bidirectional radio frequency power amplifier |
| CN205039778U (en) * | 2015-06-10 | 2016-02-17 | 泉州市捷高电子技术有限公司 | Bilateral amplifier circuit based on TDD mode |
-
2015
- 2015-06-10 CN CN201510318691.4A patent/CN104935265A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020193067A1 (en) * | 2001-04-26 | 2002-12-19 | Cowley Nicholas Paul | Radio frequency interface |
| CN101599744A (en) * | 2008-06-04 | 2009-12-09 | 上海电盈通信技术有限公司 | The high-power bilateral amplifier of tdd mode |
| CN202503478U (en) * | 2012-02-23 | 2012-10-24 | 北京琅拓科电子设备有限公司 | Bidirectional radio frequency power amplifier |
| CN205039778U (en) * | 2015-06-10 | 2016-02-17 | 泉州市捷高电子技术有限公司 | Bilateral amplifier circuit based on TDD mode |
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Application publication date: 20150923 |
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| RJ01 | Rejection of invention patent application after publication |