CN210693876U

CN210693876U - Differential alternating current stack power amplifier

Info

Publication number: CN210693876U
Application number: CN201922350757.4U
Authority: CN
Inventors: 林倩; 陈思维; 邬海峰; 陈善继
Original assignee: Qinghai Nationalities University
Current assignee: Qinghai Nationalities University
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-06-05
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a power amplifier is piled up in difference interchange, match single-ended to difference supply network, difference interchange and pile up the amplifier network and export and match difference to single-ended supply network including the input, the utility model discloses core framework adopts difference interchange to pile up amplifier network and has high power, the high gain characteristic when low supply voltage, utilizes differential amplifier to combine together with transformer network power synthesis characteristic at the good parasitic parameter rejection nature of microwave frequency channel simultaneously for whole power amplifier has obtained good high gain, high efficiency and high power output ability.

Description

Differential alternating current stack power amplifier

Technical Field

The utility model relates to a field effect transistor radio frequency power amplifier and integrated circuit field, especially to the difference exchange of the transmission module application of radio frequency microwave terminal transceiver and pile up power amplifier.

Background

With the rapid development of wireless communication systems and rf microwave circuits, rf front-end transceivers are also developing in the direction of high performance, high integration, and low power consumption. Therefore, the radio frequency and microwave power amplifiers of the transmitter are urgently required to have the performances of high output power, high gain, high efficiency, low cost and the like. However, when the integrated circuit process design is adopted to realize the chip circuit of the radio frequency and microwave power amplifier, the performance and the cost are limited to a certain extent, and the method mainly comprises the following steps:

(1) high power, high efficiency capability is limited: the typical power amplifier adopts a multi-path parallel combination structure or a distributed structure, the combination efficiency of the two structures is limited, a part of power is lost in a combination network, and the high-power and high-efficiency capability is limited.

(2) Low voltage amplification capability is limited: in order to increase the output power of the amplifier, a transistor stack structure is often used to increase the bias voltage of the amplifier and also increase the ac voltage swing. The interstage stack structure of the conventional differential stack transistor is directly connected with direct current and alternating current, and the connection structure needs high-voltage power supply and cannot adapt to the power supply trend of low voltage in the terminal of the current communication system.

Therefore, the design difficulty of the high-gain and high-power amplifier based on the integrated circuit process is as follows: high power and high efficiency output difficulty is large; the traditional stacking structure has certain defects and shortcomings under the power supply requirement of low voltage in the terminal of the current communication system.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a differential exchange piles up power amplifier is provided, has combined that the input matches the advantage that single-ended to differential supply network, differential exchange piled up amplifier network and output match differential transfer single-ended supply network synthesis technique, has at microwave frequency channel high power, high-gain and advantage such as with low costs. Meanwhile, the amplifier can be powered by low voltage, so that the problem of high voltage power supply is solved.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a differential alternating current stacked power amplifier comprises an input matching single-ended to differential power supply network, a differential alternating current stacked amplifying network and an output matching differential to single-ended power supply network;

the input end of the input matching single-ended-to-differential power supply network is the input end of the whole power amplifier, the first output end of the input matching single-ended-to-differential power supply network is connected with the first input end of the differential alternating current stacked amplifying network, and the second output end of the input matching single-ended-to-differential power supply network is connected with the second input end of the differential alternating current stacked amplifying network;

a first output end of the differential alternating current stacked amplifying network is connected with a first input end of the output matching differential-to-single-ended power supply network, and a second output end of the differential alternating current stacked amplifying network is connected with a second input end of the output matching differential-to-single-ended power supply network;

and the output end of the output matching differential-to-single-ended power supply network is the output end of the whole power amplifier.

The utility model discloses technical scheme's beneficial effect is: by adopting the differential alternating current stacking structure, the power capacity of the power amplifier can be obviously improved under the condition of conventional low-voltage power supply, meanwhile, the deterioration of parasitic parameters on high-frequency indexes can be obviously inhibited by adopting the differential structure, and the efficiency index of the power amplifier can be improved by combining the low insertion loss characteristic of an output differential-to-single-ended power supply network.

Furthermore, an input end of the input matching single-end-to-differential power supply network is connected with an inductor L_i1Inductance L_i1The other end of the transformer T is connected with₁Dotted terminal of primary coil and grounding capacitor C_i1Transformer T₁The non-homonymous end of the primary coil of (1) is grounded; transformer T₁The same-name end of the secondary coil is connected with a first output end of the input matching single-end to differential power supply network, and a transformer T₁The non-homonymous end of the secondary coil is connected with a second output end of the input matching single-end-to-differential power supply network; connecting transformer T₁Secondary winding center tap connection inductance L_i2Inductance L_i2Is connected with a bias voltage V at the other end_gAnd a grounding inductor C_i2。

The beneficial effects of the further scheme are as follows: the utility model discloses an input match single-ended to differential power supply network except can realizing the power distribution of input radio frequency signal, can also carry out impedance match and phase adjustment to radio frequency input signal, realize single-ended signal to differential signal's conversion simultaneously, guarantee differential signal's phase difference. Meanwhile, two power supply circuits of the differential signals are integrated into one power supply circuit, so that a power supply network is simplified.

Furthermore, the first input end of the differential alternating current stacking amplification network is connected with an inductor L_o1Inductance L_o1Is connected with the field effect transistor M at the other end_p1Gate and inductor L of_p1Terminal a of (1), field effect transistor M_p1The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q1And a capacitor C_p1Inductance L_q1Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p1Is connected with the field effect transistor M at the other end_q1Source and ground inductance L_r1Field effect transistor M_q1Gate connection resistance R_q1Resistance R_q1Another end of the resistor R is connected with a resistor R_o1And a ground capacitor C_q1Resistance R_o1Another end of the inductor L is connected with the inductor L_p1The b terminal of (1); field effect transistor M_q1Drain electrode of (2) is connected with a capacitor C_r1The second input end of the differential alternating current stacking amplifying network is connected with an inductor L_o2Inductance L_o2Is connected with the field effect transistor M at the other end_p2Gate and inductor L of_p2Terminal a of (1), field effect transistor M_p2The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q2And a capacitor C_p2Inductance L_q2Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p2Is connected with the field effect transistor M at the other end_q2Source and ground inductance L_r2Field effect transistor M_q2Gate connection resistance R_q2Resistance R_q2Another end of the resistor R is connected with a resistor R_o2And a ground capacitor C_q2Resistance R_q2Another end of the inductor L is connected with the inductor L_p2The b terminal of (1); field effect transistor M_q2Drain electrode of (2) is connected with a capacitor C_r1The b terminal of (1); field effect transistor M_q1The drain of the differential AC stacked amplifying network is a first output end of the differential AC stacked amplifying network, and the field effect transistor M_q2The drain of the differential alternating current stacked amplifying network is a second output end of the differential alternating current stacked amplifying network.

The beneficial effects of the further scheme are as follows: the utility model discloses the core circuit that adopts among the difference exchange stack amplification network is based on exchanging the transistor that piles up, can show gain and the power capacity that promotes the amplifier, exchanges the stack structure simultaneously and does not need the high voltage power supply, can adapt to the demand of the low voltage power supply in the terminal system; meanwhile, by adopting a differential signal structure, the sensitivity of the alternating current stacking network to high-frequency parasitic parameters can be reduced, and the gain and efficiency index of a high-frequency section can be improved.

Furthermore, a first input end and a second input end of the output matching differential-to-single-ended power supply network are respectively connected with the transformer T₂Non-dotted terminal and dotted terminal of the secondary winding of (1), transformer T₂Secondary winding of the transformer has a center tap point connected with an inductor L_out1Inductance L_out1Is connected with a bias voltage V at the other end_d2And a ground capacitor C_out1Transformer T₂The non-dotted terminal of the primary coil of (A) is grounded, and a transformer T₂Primary coil's dotted terminal connection inductance L_out2And a ground capacitor C_out2Inductance L_out2And the other end of the differential-to-single-ended power supply network is connected with the output end of the output matching differential-to-single-ended power supply network.

The beneficial effects of the further scheme are as follows: the utility model discloses an output match difference change single-ended power supply network except can realizing the power synthesis of two way differential radio frequency signal, can also convert two way differential signal into single-ended signal, the insertion loss of introducing is less, has ensured simultaneously the output and the efficiency of amplifier. Meanwhile, two power supply circuits of the differential signals are integrated into one power supply circuit, so that a power supply network is simplified.

Drawings

Fig. 1 is a schematic block diagram of a power amplifier of the present invention;

fig. 2 is a circuit diagram of the power amplifier of the present invention.

Detailed Description

Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments shown and described in the drawings are merely exemplary and are intended to illustrate the principles and spirit of the invention, not to limit the scope of the invention.

An embodiment of the utility model provides a power amplifier is piled up in difference interchange, pile up the amplifier network and export the matching difference and change single-ended supply network including input matching single-ended to difference supply network, difference interchange.

As shown in fig. 1, the input terminal of the input matching single-ended to differential power supply network is the input terminal of the whole power amplifier, the first output terminal of the input matching single-ended to differential power supply network is connected to the first input terminal of the differential ac stacked amplifying network, and the second output terminal of the input matching single-ended to differential power supply network is connected to the second input terminal of the differential ac stacked amplifying network;

As shown in fig. 2, the input end of the input matching single-ended to differential power supply network is connected with an inductor L_i1Inductance L_i1The other end of the transformer T is connected with₁Dotted terminal of primary coil and grounding capacitor C_i1Transformer T₁The non-homonymous end of the primary coil of (1) is grounded; transformer T₁The same-name end of the secondary coil is connected with a first output end of the input matching single-end to differential power supply network, and a transformer T₁The non-homonymous terminal of the secondary coil of (a) is connected with a second output terminal of the input matching single-ended to differential power supply network. Connecting transformer T₁Secondary winding center tap connection inductance L_i2Inductance L_i2Is connected with a bias voltage V at the other end_gAnd a grounding inductor C_i2。

The first input end of the differential alternating current stacking amplification network is connected with an inductor L_o1Inductance L_o1Is connected with the field effect transistor M at the other end_p1Gate and inductor L of_p1Terminal a of (1), field effect transistor M_p1The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q1And a capacitor C_p1Inductance L_q1Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p1Is connected with the field effect transistor M at the other end_q1Source and ground inductance L_r1Field effect transistor M_q1Gate connection resistance R_q1Resistance R_q1Another end of the resistor R is connected with a resistor R_o1And a ground capacitor C_q1Resistance R_o1Another end of the inductor L is connected with the inductor L_p1The b terminal of (1); field effect transistor M_q1Drain electrode of (2) is connected with a capacitor C_r1The second input end of the differential alternating current stacking amplifying network is connected with an inductor L_o2Inductance L_o2Is connected with the field effect transistor M at the other end_p2Gate and inductor L of_p2Terminal a of (1), field effect transistor M_p2The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q2And a capacitor C_p2Inductance L_q2Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p2Is connected with the field effect transistor M at the other end_q2Source and ground inductance L_r2Field effect transistor M_q2Gate connection resistance R_q2Resistance R_q2Another end of the resistor R is connected with a resistor R_o2And a ground capacitor C_q2Resistance R_q2Another end of the inductor L is connected with the inductor L_p2The b terminal of (1); field effect transistor M_q2Drain electrode of (2) is connected with a capacitor C_r1The b terminal of (1); field effect transistor M_q1The drain of the differential AC stacked amplifying network is a first output end of the differential AC stacked amplifying network, and the field effect transistor M_q2The drain of the differential alternating current stacked amplifying network is a second output end of the differential alternating current stacked amplifying network.

The first input end and the second input end of the output matching differential-to-single-ended power supply network are respectively connected with a transformer T₂Non-dotted terminal and dotted terminal of the secondary winding of (1), transformer T₂Secondary winding of the transformer has a center tap point connected with an inductor L_out1Inductance L_out1Is connected with a bias voltage V at the other end_d2And a ground capacitor C_out1Transformer T₂The non-dotted terminal of the primary coil of (A) is grounded, and a transformer T₂Primary coil's dotted terminal connection inductance L_out2And a ground capacitor C_out2Inductance L_out2And the other end of the differential-to-single-ended power supply network is connected with the output end of the output matching differential-to-single-ended power supply network.

The following introduces the specific working principle and process of the present invention with reference to fig. 2:

radio frequency input signal through input terminal RF_inThe input matching single-end to differential power supply network carries out impedance conversion matching, then the input matching single-end to differential power supply network simultaneously enters a first input end and a second input end of a differential alternating current stacking amplification network in the form of differential signals, power amplification is carried out through the amplification network, the output end of the differential alternating current stacking amplification network simultaneously outputs the signals in the form of differential signals, and after the signals pass through the output matching differential to single-end power supply network, two paths of signals are synthesized into a single-end signal which is transmitted from an output end RF_outAnd (6) outputting.

Based on above-mentioned circuit analysis, the utility model provides a difference exchanges and piles up power amplifier and the difference of the amplifier structure based on integrated circuit technology in the past lies in that the core framework adopts the difference to exchange the amplifier structure of piling up the transistor:

the structure of the differential ac stacked transistor is different from that of the conventional single transistor, and the details thereof are not repeated herein.

The differential ac stacked transistor differs from the conventional differential stacked transistor in that: the interstage stack structure of the conventional differential stack transistor is directly connected with direct current and alternating current, and the connection structure needs high voltage power supply; and the differential alternating current stacked transistor only has connection of an alternating current signal, and the direct current bias can still adopt a conventional low-voltage power supply mode, so that the differential alternating current stacked transistor is more suitable for terminal application.

In the whole differential alternating current stacked power amplifier, the size of a transistor and the sizes of other resistors and capacitors are determined after the gain, bandwidth, output power and other indexes of the whole circuit are comprehensively considered, and through later-stage layout design and reasonable layout, the required indexes can be better realized, and high-power output, high-power gain, high efficiency and good input-output matching characteristics are realized.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A differential alternating current stacked power amplifier is characterized by comprising an input matching single-ended-to-differential power supply network, a differential alternating current stacked amplifying network and an output matching differential-to-single-ended power supply network;

a first output end of the differential alternating current stacking amplification network is connected with a first input end of the output matching differential-to-single-ended power supply network; a second output end of the differential alternating current stacking amplification network is connected with a second input end of the output matching differential-to-single-ended power supply network;

the output end of the output matching differential-to-single-ended power supply network is the output end of the whole power amplifier.

2. The differential ac stacked power amplifier of claim 1, wherein the input end of the input matching single-ended to differential power supply network is connected with an inductor L_i1Inductance L_i1The other end of the transformer T is connected with₁The dotted terminal of the primary coil and the grounding capacitor C_i1Transformer T₁The non-homonymous end of the primary coil of (1) is grounded; transformer T₁The same-name end of the secondary coil is connected with a first output end of the input matching single-end to differential power supply network, and a transformer T₁The non-homonymous end of the secondary coil is connected with a second output end of the input matching single-end-to-differential power supply network; transformer T₁Secondary winding center tap connection inductance L_i2Inductance L_i2Is connected with a bias voltage V at the other end_gAnd a grounding inductor C_i2。

3. The differential ac stacked power amplifier of claim 1, wherein the first input terminal of the differential ac stacked amplifying network is connected to an inductor L_o1Inductance L_o1Is connected with the field effect transistor M at the other end_p1Gate and inductor L of_p1Terminal a of, the field effect transistor M_p1The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q1And a capacitor C_p1Inductance L_q1Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p1Is connected with the field effect transistor M at the other end_q1Source and ground inductance L_r1Field effect transistor M_q1Gate connection resistance R_q1Resistance R_q1Another end of the resistor R is connected with a resistor R_o1And a ground capacitor C_q1Resistance R_o1Another end of the inductor L is connected with the inductor L_p1The b terminal of (1); field effect transistor M_q1Drain electrode of (2) is connected with a capacitor C_r1The second input end of the differential alternating current stacking amplifying network is connected with an inductor L_o2Inductance L_o2Is connected with the field effect transistor M at the other end_p2Gate and inductor L of_p2Terminal a of, the field effect transistor M_p2The source electrode of the inductor is grounded, and the drain electrode of the inductor is connected with the inductor L_q2And a capacitor C_p2Inductance L_q2Is connected with a bias voltage V at the other end_d1And a ground capacitor C_o1Capacitor C_p2Is connected with the field effect transistor M at the other end_q2Source and ground inductance L_r2Field effect transistor M_q2Gate connection resistance R_q2Resistance R_q2Another end of the resistor R is connected with a resistor R_o2And a ground capacitor C_q2Resistance R_q2Another end of the inductor L is connected with the inductor L_p2The b terminal of (1); field effect transistor M_q2Drain electrode of (2) is connected with a capacitor C_r1The b terminal of (1); field effect transistor M_q1The drain of the differential alternating current stack amplifying network is a first output end of the differential alternating current stack amplifying network, and the field effect transistor M_q2The drain of (a) is a second output terminal of the differential ac stacked amplification network.

4. The differential AC stacked power amplifier of claim 1, wherein the first input terminal and the second input terminal of the output matched differential-to-single-ended power supply network are respectively connected with a transformer T₂Non-dotted terminal and dotted terminal of the secondary winding of (1), transformer T₂Secondary winding of the transformer has a center tap point connected with an inductor L_out1Inductance L_out1Is connected with a bias voltage V at the other end_d2And a ground capacitor C_out1Transformer T₂The non-dotted terminal of the primary coil of (A) is grounded, and a transformer T₂Primary coil's dotted terminal connection inductance L_out2And a ground capacitor C_out2Inductance L_out2And the other end of the differential-to-single-ended power supply network is connected with the output end of the output matching differential-to-single-ended power supply network.