High-performance low-power-consumption single-ended to differential conditioning signal circuit

Abstract

The invention discloses a high-performance low-power-consumption single-ended to differential conditioning signal circuit which comprises an input signal isolation conditioning circuit, a common-mode input conditioning isolation circuit, an in-phase amplification conditioning circuit and a reverse amplification conditioning circuit. The input signal isolation conditioning circuit receives a single-ended signal, prepares for a post-stage, and is connected with the in-phase and reverse amplification conditioning circuit. The common-mode input conditioning isolation circuit receives a common-mode conditioning signal, and after the stability of the common-mode conditioning signal is enhanced, the common-mode input conditioning isolation circuit accesses the reverse amplification conditioning circuit. The in-phase and reverse amplification conditioning circuit converts a single-ended signal into a differential signal and then is connected with the digital-to-analog converter. The circuit only uses a single positive power supply rail, can adapt to more AD modules without damaging signal quality, has a wide adjustable common-mode level range, and meets more AD input requirements. A negative power supply is omitted, the power supply structure is simplified, and power consumption is reduced. And moreover, a single-ended to differential chip is not needed, so that the hardware type selection cost is reduced and more device type selection schemes are provided when the design volume of the PCB is not changed.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic circuits, and specifically relates to a high-performance and low-power single-ended to differential conditioning signal circuit. Background Art

[0002] The single-ended to differential circuit is the core interface for realizing the compatibility between single-ended signals and differential systems, and is widely used in fields such as high-speed ADCs, radio frequency front-ends, and precision measurements. When the single-ended to differential conversion circuit works, the negative input terminal of the first-stage operational amplifier receives the single-ended signal from the front-end, and through the negative feedback of the first-stage operational amplifier, a single-ended signal with a 180° phase lag is output; at the same time, the output terminal of the first-stage operational amplifier is connected in series to the positive input terminal of the second-stage operational amplifier through a resistor, and a single-ended signal in the same direction is output through the follower circuit of the second-stage operational amplifier; in this way, a differential signal with a phase lag is formed for subsequent signal conditioning.

[0003] Currently, the mainstream implementation method is to use fully differential operational amplifiers. However, to adapt to the low input common-mode voltage of the subsequent high-speed ADC chips, a dual-power supply is usually used for design, which directly increases the complexity of the power supply and the product cost. Since the device itself in single-power supply design has a relatively low bandwidth, it cannot be adapted to high-speed signal conditioning in fields such as laser signal fields. Therefore, although the chips in the prior art have solved the performance problem of conditioning signals to a certain extent, they have the defects of high design cost and insufficient performance.

[0004] Similarly, the single-ended to differential circuit also has a dual operational amplifier parallel architecture; the single-ended signal generates a reverse single-ended signal through the first-stage signal conversion operational amplifier, and at the same time, the first-stage output signal is used as the input signal of the second stage. Finally, the two-stage outputs form a differential signal and are sent to the subsequent analog-to-digital converter; to ensure the normal conditioning of the signal, not only does the conditioning circuit need to be powered by a dual-power supply, but also an external input common-mode level is required. Currently, most use VREF output by the subsequent analog chip or a separate reference source chip to provide VCM, but such architectures do not support adjustable input common-mode levels and there are fewer adaptable ADCs. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-performance and low-power single-ended to differential conditioning signal circuit to solve the problems in the prior art mentioned in the background art, namely, the high power supply complexity of the dual-power supply-based scheme, the limited application scenarios of the single-power supply-based scheme due to limited bandwidth, the non-adjustable common-mode level of the built dual operational amplifier conversion circuit, and the high selection cost and fewer selection schemes.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: A high-performance and low-power single-ended to differential conditioning signal circuit includes an input signal isolation conditioning circuit, a common-mode input isolation conditioning circuit, a non-inverting amplification conditioning circuit, and an inverting amplification conditioning circuit; One end of the input signal isolation conditioning circuit is used to receive an external single-ended signal and prepare independently for subsequent conditioning; the other end of the input signal isolation conditioning circuit is respectively connected to one end of the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit; One end of the common-mode input isolation conditioning circuit is used to receive the common-mode conditioning signal and increase the stability of the common-mode conditioning signal through the common-mode input isolation conditioning circuit; the other end of the common-mode input isolation conditioning circuit is connected to one end of the inverting amplification conditioning circuit; The non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are used to convert the single-ended signal into a differential signal, and the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are respectively connected to the analog-to-digital converter.

[0007] According to the above technical solution, the input signal isolation conditioning circuit includes an input port, a first output port, a second output port, resistor R102, resistor R103, resistor R104, resistor R105, capacitor C101, and a first amplifier module U100; One end of the input port is used to receive the external single-ended signal, the other end of the input port is connected to one end of resistor R103, and the other end of resistor R103 is respectively connected to one end of resistor R104 and the positive input terminal of the first amplifier module U100; The other end of resistor R104 is grounded, the negative input terminal of the first amplifier module U100 is respectively connected to one end of resistor R102 and capacitor C101, and the other ends of resistor R102 and capacitor C101 are respectively connected to the output terminal of the first amplifier module U100 and one end of resistor R105; The other end of resistor R105 is connected to the second output port.

[0008] According to the above technical solution, in the input signal isolation conditioning circuit, the other ends of resistor R102 and capacitor C101 are both connected to the first output port, and the input signal isolation conditioning circuit is connected to the inverting amplification conditioning circuit through the first output port.

[0009] According to the above technical solution, the common-mode input isolation conditioning circuit includes resistor R107, resistor R108, resistor R109, resistor R110, and a second amplifier module U106; One end of resistor R107 is connected to the power supply, the other end of resistor R107 is respectively connected to one end of resistor R108 and the positive input terminal of the second amplifier module U106; the other end of resistor R108 is grounded, the negative input terminal of the second amplifier module U106 is connected to one end of resistor R109, and the other end of resistor R109 is respectively connected to the output terminal of the second amplifier module U106 and one end of resistor R110; The other end of resistor R110 is connected to the second output port.

[0010] According to the above technical solution, in the common-mode input isolation conditioning circuit, the other end of the resistor R109 is also connected to the third output port, and the common-mode input isolation conditioning circuit is connected to the inverting amplifier circuit through the third output port.

[0011] According to the above technical solution, the inverting amplifier conditioning circuit includes a resistor R112, a resistor R113, a resistor R114, a resistor R116, a resistor R118, a resistor R119, a resistor R120, a capacitor C115, a capacitor C117, and a third amplifier module U111; One end of the resistor R112 is connected to the first output port, and the other end of the resistor R112 is respectively connected to one end of the capacitor C117, one end of the resistor R118, and the negative input terminal of the third amplifier module U111; The other end of the capacitor C117 and the other end of the resistor R118 are respectively connected to the output terminal of the third amplifier module U111 and one end of the resistor R119; the other end of the resistor R119 is respectively connected to one end of the resistor R120 and the fourth output port; the other end of the resistor R120 is connected to the sixth output port; One end of the resistor R113 is connected to one end of the third output port, and the other end of the resistor R113 is respectively connected to the positive input terminal of the third amplifier module U111 and one end of the resistor R114; the other end of the resistor R114 is respectively connected to the capacitor C115 and one end of the resistor R116; The other end of the capacitor C115 is grounded, and the other end of the resistor R116 is connected to the power supply.

[0012] According to the above technical solution, the non-inverting amplifier conditioning circuit includes a resistor R122, a resistor R124, a resistor R125, a resistor R126, a capacitor C123, and a fourth amplifier module U121; One end of the resistor R122 is grounded, and the other end of the resistor R122 is respectively connected to the negative input terminal of the fourth amplifier module U121, the resistor R124, and one end of the capacitor C123. The other ends of the resistor R124 and the capacitor C123 are respectively connected to the output terminal of the fourth amplifier module U121 and one end of the resistor R125. The other end of the resistor R125 is respectively connected to one end of the resistor R126 and the fifth output port; The other end of the resistor R126 is connected to the sixth output port; The positive input terminal of the fourth amplifier module U121 is connected to the second output port.

[0013] According to the above technical solution, the non-inverting amplifier conditioning circuit is connected to the analog-to-digital converter through the sixth output port and the fifth output port; The reverse amplification conditioning circuit is connected to the analog-to-digital converter through the sixth output port and the fourth output port.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, only a single positive power supply rail is used, which can not only adapt to more AD modules, but also will not cause loss to the signal quality. At the same time, it provides a wider adjustable common-mode level range, which can meet more AD input requirements. In addition, the invention eliminates the negative power supply of the conditioning circuit, simplifies the power supply structure and reduces the overall power consumption. Particularly, the present invention does not require a single-ended to differential chip to be used separately. Without changing the PCB design volume basically, it not only reduces the hardware selection cost, but also provides more device selection schemes. Description of the Drawings

[0015] Figure 1 is the overall structural block diagram of the differential conversion conditioning signal circuit of the present invention; Figure 2 is the circuit diagram of the signal input isolation conditioning circuit of the present invention; Figure 3 is the circuit diagram of the signal common-mode input isolation conditioning circuit of the present invention; Figure 4 is the circuit diagram of the signal reverse amplification conditioning circuit of the present invention; Figure 5 is the circuit diagram of the signal in-phase amplification conditioning circuit of the present invention; Figure 6 is the characteristic diagram of the power supply output signal of the present invention; Figure 7 is the characteristic diagram of the single power supply output signal of the traditional architecture.

[0016] Reference numerals in the drawings: 701 - input port, 702 - first output port, 703 - second output port, 704 - fourth output port, 705 - fifth output port, 706 - sixth output port, 707 - third output port. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1 As Figure 1As shown in the figure, a high-performance and low-power single-ended to differential conditioning signal circuit, characterized in that it includes an input signal isolation conditioning circuit, a common-mode input isolation conditioning circuit, a non-inverting amplification conditioning circuit, and an inverting amplification conditioning circuit; One end of the input signal isolation conditioning circuit is used to receive an external single-ended signal and prepare independently for subsequent conditioning; the other end of the input signal isolation conditioning circuit is respectively connected to one end of the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit; One end of the common-mode input isolation conditioning circuit is used to receive a common-mode conditioning signal and increase the stability of the common-mode conditioning signal through the common-mode input isolation conditioning circuit; the other end of the common-mode input isolation conditioning circuit is connected to one end of the inverting amplification conditioning circuit; The non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are used to convert a single-ended signal into a differential signal, and the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are respectively connected to an analog-to-digital converter.

[0019] In the present invention, only a single positive power rail is used, which can not only adapt to more AD modules, but also will not cause loss to the signal quality. At the same time, it provides a wider adjustable common-mode level range and can meet more AD input requirements. In addition, the invention eliminates the negative power supply of the conditioning circuit, simplifies the power supply structure, and reduces the overall power consumption. Particularly, the present invention does not require a separate single-ended to differential chip. Under the condition that the PCB design volume remains basically unchanged, it not only reduces the hardware selection cost, but also provides more device selection schemes.

[0020] The single positive power rail mentioned in the present invention refers to a power supply path that only transmits a single positive voltage and is used to provide energy for a specific circuit module.

[0021] Embodiment 2 This embodiment is a further refinement of Embodiment 1.

[0022] As Figure 2 shown, the input signal isolation conditioning circuit includes an input port 701, a first output port 702, a second output port 703, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a capacitor C101, and a first amplifier module U100; One end of the input port 701 is used to receive an external single-ended signal, the other end of the input port 701 is connected to one end of the resistor R103, and the other end of the resistor R103 is respectively connected to one end of the resistor R104 and the positive input terminal of the first amplifier module U100; The other end of resistor R104 is grounded. The negative input terminal of the first amplifier module U100 is connected to one end of resistor R102 and capacitor C101 respectively. The other ends of resistor R102 and capacitor C101 are respectively connected to the output terminal of the first amplifier module U100 and one end of resistor R105. The other end of resistor R105 is connected to the second output port 703.

[0023] In the input signal isolation conditioning circuit, the other ends of resistor R102 and capacitor C101 are both connected to the first output port 702. The input signal isolation conditioning circuit is connected to the reverse amplification conditioning circuit through the first output port 702.

[0024] The input signal isolation conditioning circuit can receive external single-ended signals and perform isolation processing on them. On the one hand, it can avoid interference from external signals to the subsequent circuit. On the other hand, it prepares for the subsequent conditioning, improves the purity and stability of the signal, and reduces distortion and noise during signal transmission.

[0025] As Figure 3 shown, the common-mode input isolation conditioning circuit includes resistor R107, resistor R108, resistor R109, resistor R110 and the second amplifier module U106. One end of resistor R107 is connected to the power supply. The other end of resistor R107 is respectively connected to one end of resistor R108 and the positive input terminal of the second amplifier module U106. The other end of resistor R108 is grounded. The negative input terminal of the second amplifier module U106 is connected to one end of resistor R109. The other end of resistor R109 is respectively connected to the output terminal of the second amplifier module U106 and one end of resistor R110. The other end of resistor R110 is connected to the second output port 703.

[0026] In the common-mode input isolation conditioning circuit, the other end of resistor R109 is also connected to the third output port 707. The common-mode input isolation conditioning circuit is connected to the reverse amplification circuit through the third output port 707.

[0027] The common-mode input isolation conditioning circuit receives the common-mode conditioning signal and increases its stability. The stability of the common-mode signal is crucial for the conversion and processing of differential signals, can effectively suppress common-mode interference, improve the anti-interference ability of the entire circuit, and enable the circuit to work reliably in a complex electromagnetic environment.

[0028] As Figure 4 shown, the reverse amplification conditioning circuit includes resistor R112, resistor R113, resistor R114, resistor R116, resistor R118, resistor R119, resistor R120, capacitor C115, capacitor C117 and the third amplifier module U111. One end of resistor R112 is connected to the first output port 702, and the other end of resistor R112 is respectively connected to one end of capacitor C117, one end of resistor R118, and the negative input terminal of the third amplifier module U111; The other ends of capacitor C117 and resistor R118 are respectively connected to the output terminal of the third amplifier module U111 and one end of resistor R119; the other end of resistor R119 is respectively connected to resistor R120 and the fourth output port 704; the other end of resistor R120 is connected to the fourth output port 704; One end of resistor R113 is connected to one end of the third output port 707, and the other end of resistor R113 is respectively connected to the positive input terminal of the third amplifier module U111 and one end of resistor R114; the other end of resistor R114 is respectively connected to capacitor C115 and one end of resistor R116; The other end of capacitor C115 is grounded, and the other end of resistor R116 is connected to the power supply.

[0029] The converted differential signal is respectively connected to the analog-to-digital converter, which can better adapt to the input requirements of the analog-to-digital converter, improve the accuracy and performance of analog-to-digital conversion, and thus ensure the high-performance and low-power operation of the entire system, meeting the high-precision and low-power requirements of modern electronic devices for signal processing.

[0030] As Figure 5 shown, the non-inverting amplification conditioning circuit includes resistor R122, capacitor R124, capacitor R125, capacitor R126, capacitor C123, and the fourth amplifier module U121; One end of resistor R122 is grounded, and the other end of resistor R122 is respectively connected to the negative input terminal of the fourth amplifier module U121, resistor R124, and one end of capacitor C123. The other ends of resistor R124 and capacitor C123 are both respectively connected to the output terminal of the fourth amplifier module U121 and one end of resistor R125. The other end of resistor R125 is respectively connected to one end of resistor R126 and the fifth output port 705; the other end of resistor R126 is connected to the sixth output port 706; The positive input terminal of the fourth amplifier module U121 is connected to the second output port 703.

[0031] The non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit work together to convert the single-ended signal into a differential signal. The differential signal has better anti-interference performance than the single-ended signal, can reduce the influence of external noise during transmission, and at the same time improve the transmission accuracy and reliability of the signal, and is suitable for application scenarios with high requirements for signal quality.

[0032] The non-inverting amplification conditioning circuit is connected to the analog-to-digital converter through the sixth output port 706 and the fifth output port 705; The reverse amplification conditioning circuit is connected to the analog-to-digital converter through the sixth output port 706 and the fourth output port 704.

[0033] Furthermore, the first amplifier module U100, the second amplifier module U106, the third amplifier module U111, and the fourth amplifier module U121 are all powered by a single power supply.

[0034] Through the coordinated operation of each part of the circuit, this solution can achieve high-performance signal processing, including signal isolation, amplification, conversion, etc. At the same time, due to the reasonable circuit design and signal processing method, it can reduce the power consumption of the circuit, meet the requirements for low power consumption, extend the usage time of the device, and reduce energy consumption.

[0035] Embodiment III This embodiment is the waveform output result of Embodiment II ( Figure 6 ), and the single positive power supply output results of traditional single-ended to differential chips (such as imported AD8138 and domestic SF207) are added ( Figure 7 ), and the output waveforms are compared. The single positive power supply mentioned in the present invention refers to a power supply device that provides only a single positive voltage output. It converts the input power supply (such as alternating current, battery, etc.) into a stable DC positive voltage to supply power to electronic circuits or devices.

[0036] As Figure 6 shown, this circuit design adopts a single positive power supply scheme and realizes the efficient conversion of single-ended signals to differential signals through a unique link architecture.

[0037] Its working principle can be divided into the following three stages: 1. Signal isolation stage The original single-ended signal is first subjected to amplitude conditioning, and then impedance isolation is performed through a voltage follower to ensure signal integrity and avoid mutual influence between the front and rear stage circuits.

[0038] 2. Dual-path processing stage The isolated signal is respectively sent to two processing channels: In-phase amplifier channel: Realize the function of synchronously adjusting the output common-mode voltage and signal amplitude.

[0039] Inverting amplifier channel: Perform phase inversion and level offset processing on the signal by applying an external common-mode voltage.

[0040] 3. Differential synthesis stage The dual-channel outputs are vectorially subtracted at the differential node, and finally a differential signal with consistent delay and good P / N symmetry is formed. This signal can be directly connected to the subsequent AD conversion module for sampling processing.

[0041] In the present invention, the circuit is powered only by a single positive power supply. Through precise common-mode voltage control, signal polarity inversion and DC bias synchronization adjustment are achieved in the inverting channel, ensuring that both the effective signal components can be retained and the stability of the system common-mode voltage can be maintained during differential synthesis.

[0042] As Figure 7 shown, traditional single-ended to differential chips (such as the imported AD8138 and the domestic SF207) have output distortion problems in the single power supply scenario. When the low level of the input signal is 0V, due to the lack of a negative power supply rail restricting the feedback link of the negative output terminal, the output waveform will be distorted. This architectural defect also affects the positive output terminal through the coupling effect, ultimately resulting in overall distortion of the differential signal.

[0043] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-performance and low-power single-ended to differential conditioning signal circuit, characterized in that: It includes an input signal isolation conditioning circuit, a common-mode input isolation conditioning circuit, a non-inverting amplification conditioning circuit, and an inverting amplification conditioning circuit; One end of the input signal isolation conditioning circuit is used to receive an external single-ended signal and prepare independently for subsequent conditioning; the other end of the input signal isolation conditioning circuit is respectively connected to one end of the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit; One end of the common-mode input isolation conditioning circuit is used to receive a common-mode conditioning signal and increase the stability of the common-mode conditioning signal through the common-mode input isolation conditioning circuit; the other end of the common-mode input isolation conditioning circuit is connected to one end of the inverting amplification conditioning circuit; The non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are used to convert the single-ended signal into a differential signal, and the non-inverting amplification conditioning circuit and the inverting amplification conditioning circuit are respectively connected to an analog-to-digital converter.

2. The high-performance and low-power single-ended to differential conditioning signal circuit according to claim 1, wherein: The input signal isolation conditioning circuit includes an input port (701), a first output port (702), a second output port (703), a resistor R102, a resistor R103, a resistor R104, a resistor R105, a capacitor C101, and a first amplifier module U100; One end of the input port (701) is used to receive an external single-ended signal, the other end of the input port (701) is connected to one end of the resistor R103, and the other end of the resistor R103 is respectively connected to one end of the resistor R104 and the positive input terminal of the first amplifier module U100; The other end of the resistor R104 is grounded, the negative input terminal of the first amplifier module U100 is respectively connected to one end of the resistor R102 and the capacitor C101, and the other ends of the resistor R102 and the capacitor C101 are respectively connected to the output terminal of the first amplifier module U100 and one end of the resistor R105; The other end of the resistor R105 is connected to the second output port (703).

3. A high-performance and low-power single-ended to differential conditioning signal circuit according to claim 2, characterized in that: In the input signal isolation conditioning circuit, the other ends of the resistor R102 and the capacitor C101 are both connected to the first output port (702), and the input signal isolation conditioning circuit is connected to the inverting amplification conditioning circuit through the first output port (702).

4. A high-performance and low-power single-ended to differential conditioning signal circuit according to claim 3, wherein: The common-mode input isolation conditioning circuit includes a resistor R107, a resistor R108, a resistor R109, a resistor R110, and a second amplifier module U106; One end of the resistor R107 is connected to the power supply, the other end of the resistor R107 is respectively connected to one end of the resistor R108 and the positive input terminal of the second amplifier module U106; the other end of the resistor R108 is grounded, the negative input terminal of the second amplifier module U106 is connected to one end of the resistor R109, and the other end of the resistor R109 is respectively connected to the output terminal of the second amplifier module U106 and one end of the resistor R110; The other end of the resistor R110 is connected to the second output port (703).

5. A high-performance and low-power single-ended to differential conditioning signal circuit according to claim 4, characterized in that: In the common-mode input isolation conditioning circuit, the other end of the resistor R109 is also connected to a third output port (707), and the common-mode input isolation conditioning circuit is connected to the inverting amplification circuit through the third output port (707).

6. The high-performance and low-power single-ended to differential conditioning signal circuit according to claim 5, wherein: The inverting amplification conditioning circuit includes resistor R112, resistor R113, resistor R114, resistor R116, resistor R118, resistor R119, resistor R120, capacitor C115, capacitor C117, and the third amplifier module U111; One end of resistor R112 is connected to the first output port (702), and the other end of resistor R112 is respectively connected to one end of capacitor C117, one end of resistor R118, and the negative input terminal of the third amplifier module U111; The other ends of capacitor C117 and resistor R118 are respectively connected to the output terminal of the third amplifier module U111 and one end of resistor R119; the other end of resistor R119 is respectively connected to one end of resistor R120 and the fourth output port (704); the other end of resistor R120 is connected to the sixth output port (706); One end of resistor R113 is connected to one end of the third output port (707), and the other end of resistor R113 is respectively connected to the positive input terminal of the third amplifier module U111 and one end of resistor R114; the other end of resistor R114 is respectively connected to capacitor C115 and one end of resistor R116; The other end of capacitor C115 is grounded, and the other end of resistor R116 is connected to the power supply.

7. A high-performance and low-power single-ended to differential conditioning signal circuit according to claim 6, wherein: The non-inverting amplification conditioning circuit includes resistor R122, resistor R124, resistor R125, resistor R126, capacitor C123, and the fourth amplifier module U121; One end of resistor R122 is grounded, and the other end of resistor R122 is respectively connected to the negative input terminal of the fourth amplifier module U121, resistor R124, and one end of capacitor C123. The other ends of resistor R124 and capacitor C123 are both respectively connected to the output terminal of the fourth amplifier module U121 and one end of resistor R125. The other end of resistor R125 is respectively connected to one end of resistor R126 and the fifth output port (705); The other end of resistor R126 is connected to the sixth output port (706); The positive input terminal of the fourth amplifier module U121 is connected to the second output port (703).

8. A high-performance and low-power single-ended to differential conditioning signal circuit according to claim 7, characterized in that: The non-inverting amplification conditioning circuit is connected to the analog-to-digital converter through the sixth output port (706) and the fifth output port (705); The inverting amplification conditioning circuit is connected to the analog-to-digital converter through the sixth output port (706) and the fourth output port (704).

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