Amplitude-phase integrated regulation and control circuit based on resistance attenuation network

Abstract

An amplitude-phase integrated regulation and control circuit based on a resistance attenuation network, relating to the technical field of regulation and control circuits. The amplitude-phase integrated regulation and control circuit based on a resistance attenuation network comprises a phase regulation and control network and a symmetrical resistance attenuation network, wherein the phase regulation and control network comprises a phase regulation and control switch transistor (M0) and a phase regulation and control capacitor (C0), the phase regulation and control switch transistor (M0) has a control end connected to a control signal (V0) and two other connection ends respectively grounded and connected to a first end of the phase regulation and control capacitor (C0), and a second end of the phase regulation and control capacitor (C0) is connected to a symmetrical position connection end of the resistance attenuation network. Compared with existing cascaded amplitude-phase control systems, the amplitude-phase integrated regulation and control circuit based on a resistance attenuation network has added thereto only the phase regulation and control switch transistor (M0) and a capacitor element, and additionally achieves a phase regulation and control function while keeping the size of an attenuation unit unchanged; in addition, due to the integrated arrangement of the circuit, circuit insertion loss is avoided and circuit efficiency is improved.

Description

Amplitude and phase integrated control circuit based on resistance attenuation network Technical Field

[0001] The present invention relates to the technical field of control circuits, and in particular to an amplitude-phase integrated control circuit based on a resistance attenuation network. Background Art

[0002] High-precision phase shifting and attenuation circuits are widely used in electronic systems such as phased array systems and broadband electronic countermeasures. Their phase shifting and attenuation accuracy indicators directly affect core performance such as beam scanning accuracy. In large-scale phased array and other transceiver systems, phase shifting and attenuation circuits greatly affect system costs.

[0003] Traditional passive phase shifting and attenuation circuits are implemented by cascading high-pass and low-pass networks and resistive attenuation networks, respectively. Although high-precision phase shifting and attenuation characteristics can be achieved in a specific frequency band through parameter optimization, the phase shifting and attenuation circuit structure in this method cannot be reused, resulting in a large circuit size and limiting the improvement of circuit integration.

[0004] Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the present invention provides an amplitude-phase integrated control circuit based on a resistor attenuation network, which solves the technical problem of large size of the phase shift and attenuation circuits in the existing technology.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] The present invention provides an amplitude-phase integrated control circuit based on a resistance attenuation network, comprising a phase control network and a symmetrical resistance attenuation network;

[0010] The phase control network includes a phase control switch tube and a phase control capacitor. The first end of the phase control switch tube is grounded, and the second end is connected to the first end of the phase control capacitor.

[0011] The third terminal is connected to the control signal;

[0012] The second end of the phase control capacitor is connected to the symmetrical connection end of the resistance attenuation network.

[0013] Preferably, the symmetrical resistance attenuation network includes a π-type resistance attenuation network or a bridge T-type resistance attenuation network.

[0014] Preferably, the π-type resistance attenuation network includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube, a second switch tube and a third switch tube;

[0015] wherein the first resistor and the third resistor have the same resistance, and the second resistor and the fourth resistor have the same resistance;

[0016] The first end and the second end of the second switch tube are connected to the first end of the first resistor and the first end of the second resistor respectively;

[0017] The first end and the second end of the third switch tube are respectively connected to the first end of the third resistor and the first end of the fourth resistor;

[0018] The second ends of the first resistor and the third resistor are connected to each other, and the connection ends thereof are symmetrically located connection ends of the π-type resistance attenuation network;

[0019] The second ends of the second resistor and the fourth resistor are grounded;

[0020] The first end of the first switch tube is connected to the input signal, and the second end is connected to the output signal;

[0021] The third ends of the first switching tube, the second switching tube, and the third switching tube are all connected to the control signal, wherein the second switching tube and the third switching tube are connected to the control signal of the same direction, and the first switching tube, the second switching tube, and the third switching tube are connected to the control signal of opposite directions.

[0022] Preferably, in the amplitude control state, two different amplitude characteristics are achieved by controlling the first switch tube, the second switch tube and the third switch tube;

[0023] When the control signal of the first switch tube is high, the first switch tube is turned on, the second switch tube and the third switch tube are disconnected, and the input signal is transmitted through the first switch tube in the on state (low resistance state);

[0024] When the control signal of the first switch tube is low, the second switch tube and the third switch tube are turned on, the first switch tube is turned off, and the signal is transmitted through the π-type resistor network composed of the first resistor, the second resistor, the third resistor, and the fourth resistor.

[0025] Preferably, in the phase control state, the phase control is achieved by controlling the phase control switch tube;

[0026] When the control signal of the phase control switch tube is high, the phase control switch tube is turned on, and the phase control switch tube is equivalent to a resistor; after the phase control capacitor is connected in series with the resistor, the equivalent phase control capacitor is directly grounded, which is the phase reference state;

[0027] When the control signal of the phase control switch tube is low, the phase control switch tube is disconnected, and the phase control switch tube is equivalent to a small capacitor in the off-state; the phase control capacitor and the small capacitor in the off-state are connected in series to ground, which is a phase-shift state.

[0028] Preferably, the bridge T-type resistance attenuation network includes a first switch tube, a second switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor;

[0029] The first resistor and the third resistor have the same resistance, and the second resistor and the fourth resistor have the same resistance;

[0030] The first end of the first switching tube is connected to the second end of the first switching tube via the second resistor and the fourth resistor;

[0031] The first end of the first resistor is connected to the common end of the first switch tube and the second resistor, and the common end thereof is connected to the input signal; the second end of the first resistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the common end of the first switch tube and the fourth resistor, and the common end thereof is connected to the output signal;

[0032] The connection ends of the first resistor and the third resistor are symmetrical connection ends of the bridge T-type resistor attenuation network;

[0033] A first end of the second switch tube is connected to the connection end of the second resistor and the fourth resistor; a second end of the second switch tube is grounded via the fifth resistor;

[0034] The third ends of the first switch tube and the second switch tube are both connected to the control signal, and the control signals connected thereto are mutually opposite control signals. (3) Beneficial effects

[0035] The present invention provides an integrated amplitude and phase control circuit based on a resistor attenuation network. Compared with the existing technology, it has the following advantages:

[0036] The present invention provides an integrated amplitude and phase control circuit based on a resistor attenuation network. The circuit includes a phase control network and a symmetrical resistor attenuation network. The phase control network includes a phase control switch tube and a phase control capacitor. The control end of the phase control switch tube is connected to a control signal, and the other two connection ends are respectively grounded and connected to the first end of the phase control capacitor; the second end of the phase control capacitor is connected to the symmetrical connection ends of the resistor attenuation network. Compared to existing cascaded amplitude and phase control systems, the present invention only adds a phase control switch tube and a capacitor element. This allows for additional phase control while maintaining the same attenuation unit size. Furthermore, the integrated arrangement avoids circuit insertion loss and improves circuit efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] FIG1 is a block diagram of an amplitude-phase integrated control circuit based on a resistor attenuation network according to an embodiment of the present invention;

[0039] FIG2 is a circuit diagram of an amplitude-phase integrated control circuit based on a π-type resistor attenuation network according to an embodiment of the present invention;

[0040] 3a and 3b are diagrams illustrating the amplitude control principle of the amplitude-phase integrated control circuit based on a π-type resistor attenuation network according to an embodiment of the present invention;

[0041] FIG4 is a simulation result of the amplitude characteristics of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network according to an embodiment of the present invention;

[0042] FIG5 is a simulation result of the attenuation characteristics of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network according to an embodiment of the present invention;

[0043] 6a, 6b, and 6c are diagrams illustrating the phase control principle in the reference state (non-attenuation state) of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network according to an embodiment of the present invention;

[0044] FIG7 is a simulation result of the phase characteristics of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network according to an embodiment of the present invention;

[0045] FIG8 is a simulation result of the phase shift characteristics of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network according to an embodiment of the present invention;

[0046] FIG9 is a circuit diagram of an amplitude-phase integrated control circuit based on a bridge T-type resistor attenuation network according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] It should be noted that, for the sake of convenience, the switch MOSFET is used to represent the controllable (on and off) switch tube in the embodiment of the present invention, but the switch tube in the present invention is not limited to MOSFET. MOSFET is used as an example for explanation. The third end of the MOSFET is the control end, that is, the gate; the first end is the drain or source, and the second end is the drain or source, that is, in the embodiment of the present invention, the circuits connected to the drain and source of the switch tube can be interchanged with each other and are not affected. A drive control signal is applied to the control end of each switch tube in the embodiment of the present invention. For the sake of brevity, it will not be described in detail later. The power switch tube in the embodiment of the present invention can also be implemented using other controllable switch tube devices other than MOSFET, such as IGBT.

[0049] The embodiment of the present application solves the technical problem of large size of phase shifting and attenuation circuits in the prior art by providing an integrated amplitude and phase control circuit based on a resistance attenuation network. Only a phase control switch tube and a capacitor element are added to the resistance attenuation network unit, thereby realizing an additional phase control function while keeping the size of the attenuation unit unchanged.

[0050] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0051] While cascading high- and low-pass networks and resistive attenuation networks can achieve high-precision phase shifting and attenuation characteristics within specific frequency bands through parameter optimization, they suffer from the following drawbacks: 1. The phase-shifting and attenuation circuit structure cannot be reused, resulting in a large circuit size and limiting the degree of circuit integration; 2. The need for cascading phase-shifting and attenuation circuits in amplitude-phase control systems increases circuit insertion loss and reduces circuit efficiency. To address these issues, embodiments of the present invention propose adding a phase control subcircuit to traditional π-type or bridge-T-type resistive attenuation network units, thereby achieving additional phase modulation while maintaining the attenuation performance and circuit size of the attenuation circuit unit essentially unchanged.

[0052] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0053] An embodiment of the present invention provides an amplitude-phase integrated control circuit based on a resistance attenuation network, as shown in Figure 1. The circuit includes a phase control network and a symmetrical resistance attenuation network, wherein the phase control network includes a phase control switch tube and a phase control capacitor. The control end of the phase control switch tube is connected to the control signal, and the other two connection ends are respectively grounded and connected to the first end of the phase control capacitor; the second end of the phase control capacitor is connected to the symmetrical position connection end of the resistance attenuation network.

[0054] Compared with the existing cascaded amplitude-phase control system, the embodiment of the present invention only adds a phase control switch tube and a capacitor element, which can additionally realize the phase control function while keeping the size of the attenuation unit unchanged. At the same time, the integrated setting avoids circuit insertion loss and improves circuit efficiency.

[0055] In a specific implementation, the resistor attenuation network includes a π-type or bridge T-type resistor attenuation network. As shown in FIG2 , disclosed is an integrated amplitude and phase control circuit based on a π-type resistor attenuation network. In this integrated control circuit, the gate of the phase control switch M0 of the phase control network is connected to the control signal V0, the drain of M0 is grounded, the source of M0 is connected to the first end of the phase control capacitor C0, and the second end of C0 is connected to the symmetrical connection end of the π-type resistor attenuation network. It should be noted that in a specific implementation, the connection method of the source and drain of M0 can be interchangeable, that is, the drain is connected to C0 and the source is grounded.

[0056] The π-type resistor attenuation network includes two symmetrical circuit modules and a first switch M1. Each of the two symmetrical circuit modules includes two resistors and a switch. The drain and source of the second switch M2 are connected to the first ends of the first resistor R1 and the fifth resistor R5, respectively. The drain and source of the third switch M3 are connected to the first ends of the third resistor R3 and R4, respectively. The second ends of the first resistor R1 and the third resistor R3 are connected to each other, forming a symmetrical connection point in the π-type resistor attenuation network. The second ends of the second and fourth resistors are grounded. The second and third switches are connected to control signals of the same direction.

[0057] The source of the first switch tube M1 is connected to the input signal, the drain is connected to the output signal, and the gate is connected to the control signal. The first switch tube M1, the second switch tube M2, and the third switch tube M3 are connected to control signals that are opposite to each other.

[0058] The resistance of R1 and R3 is the same, and the resistance of R2 and R4 is the same

[0059] The amplitude control principle of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network shown in Figure 2 is shown in Figures 3a and 3b:

[0060] As shown in Figure 3a, Vc and They are opposite control signals. When the Vc signal is high, the first switch tube M1 is turned on, M2 and M3 are turned off, and the signal is transmitted through the low-resistance state of M1. At this time, the transmission state is defined as the amplitude reference state (no attenuation), that is, the transmission parameter S21 (Vc=1).

[0061] As shown in FIG3b , when the Vc signal is low, switches M2 and M3 are turned on and M1 is turned off. The signal is transmitted through the π-type resistor attenuation network composed of R1, R2, R3, and R4. The transmission state is defined as the attenuation state, i.e., the transmission parameter S21′ (Vc=0).

[0062] The reference and attenuation states have different amplitude characteristics, enabling specific amplitude differences, i.e., amplitude modulation. In the simulation design, the parameters R1 = 20Ω, R2 = 220Ω, C0 = 120fF, transistor M1 gate length 60nm, gate width 10um, and transistors M1 and M2 gate length 60nm, gate width 4um. See Figures 4 and 5 for the attenuation simulation results. Figure 5 shows that in both transmission states V0 = 0 and V0 = 1, the attenuation values ​​are both around 4dB, with no significant change. This indicates that the state of the phase control network does not affect the attenuation characteristics.

[0063] The phase control principle of the amplitude-phase integrated control circuit based on the π-type resistor attenuation network shown in Figure 2 is shown in Figures 6a, 6b, and 6c:

[0064] As shown in Figure 6a, when V0 is high, the switch tube M0 is in the off state. At this time, the switch tube M0 is equivalent to a small resistor RM0. After the phase control capacitor C0 is connected in series with the on-state equivalent resistance RM0 of the switch tube M0, it can be approximated that C0 is directly grounded. The equivalent grounding capacitance is large. At this time, the transmission state is defined as the phase reference state (no phase shift), that is, the transmission parameter S21 (Vc = 1, V0 = 1).

[0065] As shown in Figure 6b, when V0 is low, the switch tube M0 is in the off state. At this time, the switch tube M0 is equivalent to the off-state small capacitor CM0. The phase control capacitor C0 and the off-state equivalent capacitor CM0 of the switch tube M0 are connected in series, and the capacitance is very small. The equivalent grounding capacitance is also small. At this time, the transmission state is defined as the phase-shift state, that is, the transmission parameter S21 (Vc=1, V0=0).

[0066] As shown in FIG6c , in the two transmission states, a specific phase difference value can be achieved, that is, phase modulation is achieved.

[0067] Based on the simulation parameter settings described above for the amplitude control principle, simulation results show that the integrated amplitude and phase control circuit designed in this invention, based on a π-type resistor attenuation network, can achieve 10° phase control within the 32-38 GHz range. Phase shift results are shown in Figures 7 and 8 . Figure 8 shows that under both the Vc = 0 and Vc = 1 transmission states, the phase shift value remains around 10°, with no significant change. This indicates that the state of the amplitude control unit circuit does not affect the phase shift characteristics.

[0068] As shown in Figure 9. The embodiment of the present invention also proposes an amplitude-phase integrated control circuit based on a bridge T-type resistor attenuation network, which is consistent with the amplitude-phase integrated control circuit based on a π-type resistor attenuation network in principle and can achieve the same function.

[0069] It should be noted that the first resistor R11 and the third resistor R21 have the same resistance, and the second resistor R10 and the fourth resistor R20 have the same resistance.

[0070] In this circuit, the phase control network includes a phase control switch tube and a phase control capacitor. The control end of the phase control switch tube is connected to the control signal, and the other two connection ends are respectively grounded and connected to the first end of the phase control capacitor; the second end of the phase control capacitor is connected to the symmetrical position connection end of the bridge T-type resistor attenuation network.

[0071] The bridge T-type resistance attenuation network includes a first switch tube M1, a second switch tube M2, a first group of symmetrical resistors R11 and R21, a second group of symmetrical resistors R10 and R20, and a fifth resistor R5.

[0072] The gate of the first switch tube M1 and the gate of the second switch tube M2 are connected to control signals that are opposite to each other.

[0073] The first end of the first switch tube M1 is connected to the second end of the first switch tube M1 via the resistors R10 and R20.

[0074] A first end of the resistor R11 is connected to a common end of M1 and R10, and the common end is connected to an input signal; a second end of the resistor R11 is connected to a first end of the resistor R21, and a second end of the resistor R21 is connected to a common end of M1 and R20, and the common end is connected to an output signal.

[0075] The connection ends of the resistor R11 and the resistor R21 are symmetrical connection ends of the bridge T-type resistor attenuation network.

[0076] A first end of the second switch tube M2 is connected to the connection end of the resistor R10 and the resistor R20 ; a second end of the second switch tube M2 is grounded via the fifth resistor R5 .

[0077] In summary, compared with the existing technology, the present invention has the following beneficial effects:

[0078] 1. Compared with the existing amplitude-phase control system through cascade connection, the embodiment of the present invention adds a phase control network. The phase control network only includes a phase control switch tube and a capacitor element. The phase control network is connected to the symmetrical connection end of the resistance attenuation network. The performance of the signal remains consistent when it is transmitted in the forward or reverse direction of the original circuit. The phase control function can be additionally realized while the size of the attenuation unit remains unchanged. At the same time, the integrated setting avoids circuit insertion loss and improves circuit efficiency.

[0079] 2. In the phase control state, since the amplitude parasitic value caused by changing the phase control switch tube is small, the integrated circuit of the embodiment of the present invention maintains a low amplitude parasitic value during the phase control process.

[0080] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An amplitude-phase integrated control circuit based on a resistor attenuation network, characterized in that: Including a phase control network and a symmetrical resistance attenuation network; The phase control network includes a phase control switch tube and a phase control capacitor, wherein a first end of the phase control switch tube is grounded, a second end is connected to a first end of the phase control capacitor, and a third end is connected to a control signal; The second end of the phase regulating capacitor is connected to a symmetrically located connection end of the resistor attenuation network.

2. The integrated amplitude and phase control circuit based on the resistor attenuation network according to claim 1, characterized in that: The symmetrical resistance attenuation network includes a π-type resistance attenuation network or a bridge T-type resistance attenuation network.

3. The integrated amplitude and phase control circuit based on the resistor attenuation network according to claim 2, characterized in that: The π-type resistance attenuation network includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch tube, a second switch tube and a third switch tube; The first resistor and the third resistor have the same resistance, and the second resistor and the fourth resistor have the same resistance; The first end and the second end of the second switch tube are connected to the first end of the first resistor and the first end of the second resistor respectively; The first end and the second end of the third switch tube are respectively connected to the first end of the third resistor and the first end of the fourth resistor; The second ends of the first resistor and the third resistor are connected to each other, and the connection ends thereof are symmetrically located connection ends of the π-type resistor attenuation network; The second ends of the second resistor and the fourth resistor are grounded; The first end of the first switch tube is connected to the input signal, and the second end is connected to the output signal; The third ends of the first switch tube, the second switch tube and the third switch tube are all connected to the control signal, wherein the second switch tube and the third switch tube are connected to the control signal of the same direction, and the first switch tube and the second switch tube and the third switch tube are connected to the control signal of opposite directions.

4. The amplitude-phase integrated control circuit based on the resistor attenuation network according to claim 3, characterized in that: In the amplitude control state, two different amplitude characteristics are realized by controlling the first switch tube, the second switch tube and the third switch tube; When the control signal of the first switch tube is high, the first switch tube is turned on, the second switch tube and the third switch tube are disconnected, and the input signal is transmitted through the first switch tube in an open state with low resistance; When the control signal of the first switch tube is low, the second switch tube and the third switch tube are turned on, the first switch tube is turned off, and the signal is transmitted through the π-type resistor network composed of the first resistor, the second resistor, the third resistor, and the fourth resistor.

5. The integrated amplitude and phase control circuit based on the resistor attenuation network according to claim 3, characterized in that: In the phase control state, phase control is achieved by controlling the phase control switch tube; When the control signal of the phase control switch tube is high, the phase control switch tube is turned on, and the phase control switch tube is equivalent to a resistor; after the phase control capacitor is connected in series with the resistor, the equivalent phase control capacitor is directly grounded, which is the phase reference state; When the control signal of the phase control switch tube is low, the phase control switch tube is disconnected, and the phase control switch tube is equivalent to a small capacitor in the off-state; the phase control capacitor and the small capacitor in the off-state are connected in series to ground, which is a phase shift state.

6. The amplitude-phase integrated control circuit based on the resistor attenuation network according to claim 2, characterized in that: The bridge T-type resistance attenuation network includes a first switch tube, a second switch tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor; The first resistor and the third resistor have the same resistance, and the second resistor and the fourth resistor have the same resistance; The first end of the first switch tube is connected to the second end of the first switch tube via the second resistor and the fourth resistor; The first end of the first resistor is connected to the common end of the first switch tube and the second resistor, and the common end thereof is connected to the input signal; the second end of the first resistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the common end of the first switch tube and the fourth resistor, and the common end thereof is connected to the output signal; The connection ends of the first resistor and the third resistor are symmetrically located connection ends of the bridge T-type resistor attenuation network; A first end of the second switch tube is connected to a connection end of the second resistor and the fourth resistor; a second end of the second switch tube is grounded via a fifth resistor; The third ends of the first switch tube and the second switch tube are both connected to control signals, and the control signals connected thereto are control signals in opposite directions to each other.

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