Adjustable complementary output driving device

Abstract

The invention discloses an adjustable complementary output driving device, and the device comprises a power amplification unit which is used for receiving a first signal I inputted from the outside, and carrying out the 1: 1 amplification of the first signal I; the signal processing unit is connected with the power amplification unit and is used for receiving the first signal I and a reference signal R, directly outputting the first signal I output by the power amplification unit to obtain a second signal A, and performing subtraction operation on the first signal I output by the power amplification unit and the reference signal R to obtain a second signal B; a result obtained through the subtraction operation is output to obtain a third signal B, and B = R-I; and the driving unit is connected with the signal processing unit and is used for receiving the second signal A and the third signal B output by the signal processing unit. According to the invention, the amplitudes of the second signal A and the third signal B can be adjusted by adjusting the reference signal R, so that the second signal A and the third signal B can meet any waveform within the range of A + B = R.

Description

TECHNICAL FIELD

[0001] The present application relates to an adjustable complementary output driving device. BACKGROUND

[0002] At present, most of the complementary outputs adopt the direct action output of analog-to-digital conversion devices, and for the double complementary output, software control is adopted to compensate on the software to achieve the purpose of a pair of complementary outputs. Alternatively, double-channel MOS tubes are directly used for mutual output, but the complementary value of the output is a fixed value and cannot be arbitrarily changed.

[0003] The prior art mainly has the following problems: (1) Due to the medium properties of the device itself, as the temperature changes, the conductive characteristics of the device itself also change, resulting in unstable output signals and poor consistency; (2) The input signal and the output signal have large hysteresis; (3) Due to the limitations of the input and output signal amplitudes, the output signal error is large; (4) The existing scheme can only fixedly output and cannot be adjusted in real time; (5) The entire control link is complex and the cost is high; (6) Due to the small input end impedance of the link signal, signal distortion is easily caused, which is not suitable for application in low-power and high-frequency fields. SUMMARY

[0004] The present application aims to overcome one or more of the deficiencies of the prior art and provide an adjustable complementary output driving device.

[0005] The purpose of the present application is achieved by the following technical scheme: an adjustable complementary output driving device, comprising: a power amplifier unit for receiving an externally input first signal I and amplifying the first signal I by 1:1; a signal processing unit connected with the power amplifier unit, for receiving the first signal I and a reference signal R, directly outputting the first signal I output by the power amplifier unit to obtain a second signal A, and performing subtraction operation on the first signal I output by the power amplifier unit and the reference signal R, and outputting the result of the subtraction operation to obtain a third signal B, wherein B=R-I; a driving unit connected with the signal processing unit, for receiving the second signal A and the third signal B output by the signal processing unit.

[0006] Preferably, the adjustable complementary output driving device further comprises: a temperature compensation unit connected with the power amplifier unit, for temperature compensation of the first signal I.

[0007] The beneficial effects of the present application are: (1) The present application can adjust the amplitudes of the second signal A and the third signal B by adjusting the reference signal R, so that the second signal A and the third signal B can be a pair of complementary waveforms or a pair of identical waveforms, and can satisfy any waveform within the range of A+B=R; (2) The present application introduces a temperature compensation function, which can ensure consistency within different temperature ranges as much as possible; (3) The present application only needs an integrated three-way operational amplifier, a thermistor and several high-precision conventional fixed resistors to achieve, which is very low in cost compared to other designs (such as digital-to-analog converters, MOS tube solutions, etc.). BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 A composition block diagram of the adjustable complementary output driving device of the present application. DETAILED DESCRIPTION

[0009] The technical solutions of the present application will be described in detail below with reference to the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0010] Referring to Figure 1 , the present embodiment provides an adjustable complementary output driving device: As Figure 1 shown, the adjustable complementary output driving device comprises a power amplifier unit, a signal processing unit and a driving unit, the input end of the power amplifier unit is used for receiving an externally input first signal I, the output end of the power amplifier unit is connected with the first input end of the signal processing unit, the second input end of the signal processing unit is used for receiving a reference signal R, and the output end of the signal processing unit is connected with the input end of the driving unit.

[0011] The power amplifier unit is used for 1:1 amplification of the first signal I. The present embodiment abandons the traditional design method of working the transistor in the switching state, and adopts working in the amplification state; after 1:1 amplification by the operational amplifier, a signal with the same amplitude and phase as the signal I is output, which has strong driving ability.

[0012] Generally, the power amplifier unit is composed of an operational amplifier.

[0013] The signal processing unit is configured to output a second signal A directly from the first signal I output by the power amplifier unit, and to perform a subtraction operation on the first signal I output by the power amplifier unit and the reference signal R, and output a third signal B from the result of the subtraction operation, wherein B = R - I.

[0014] In the embodiment, since I = A and B = R - I, the amplitudes of the second signal A and the third signal B can be adjusted by adjusting the reference signal R, so that the second signal A and the third signal B can be a pair of complementary waveforms or a pair of identical waveforms, and can satisfy any waveform within the range of A + B = R. Meanwhile, the maximum output amplitude of the second signal A and the third signal B can be ensured not to be greater than the VDD (digital power supply) of the driving unit, and the minimum output amplitude can be ensured not to be less than the VEE (negative power supply) of the driving unit.

[0015] In some embodiments, the adjustable complementary output driving device further comprises a temperature compensation unit connected with the power amplifier unit, and configured to perform temperature compensation on the first signal I.

[0016] When the temperature changes, the gain of the loop changes, and then the compensation amount is fed back to the negative input of the operational amplifier through the temperature compensation unit, so as to eliminate the influence and ensure the consistency in different temperature ranges.

[0017] The above description is only preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the claims of the present application.

Claims

1. An adjustable complementary output drive device, characterized in that: include: a power amplifier unit, configured to receive a first signal I input from an external source and amplify the first signal I in a 1:1 ratio; a signal processing unit connected to the power amplifier unit, configured to receive the first signal I and a reference signal R, directly output the first signal I output by the power amplifier unit to obtain a second signal A, perform a subtraction operation on the first signal I output by the power amplifier unit and the reference signal R, and output a result of the subtraction operation to obtain a third signal B, wherein B=RI; The driving unit is connected to the signal processing unit and is used to receive the second signal A and the third signal B output by the signal processing unit.

2. The adjustable complementary output drive device according to claim 1, characterized in that: The adjustable complementary output drive device further comprises: A temperature compensation unit is connected to the power amplifier unit and is used to perform temperature compensation on the first signal I.

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