Novel analog signal amplifier

Abstract

The invention discloses a novel analog signal amplifier which comprises a microprocessor circuit, a power supply circuit, a man-machine interface circuit, a communication interface circuit, a digital IO interface circuit, a digital and analog conversion circuit, and an analog signal differential amplification circuit. According to the novel analog signal amplifier, a signal passband is wide, and the application of a high speed control response is satisfied. Output end analog signal can be collected in a high speed, analog acquisition equipment is saved, and the hardware cost is saved. A man-machine interface is convenient, a customer operation is simple, and information can be set and obtained visually. The execution of a sensor and analog signal amplifier calibration operation is simple and quick, and a calibration result is accurate and is not affected by user professionality and the precision of other testing instruments. Communication interfaces are rich. LAN communication can be formed by multiple analog signal amplifiers through a CAN bus, the wire layout is convenient, and the reliability is high. A digital IO interface is arranged, and back level control equipment can conveniently and timely obtain the state of an acquisition quantity to control the acquisition quantity. The energy utilization efficiency is high, and heat generation is small.

Description

Technical field: [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a novel analog signal amplifier. Background technique: [0002] Analog signal amplifiers are mainly used in applications such as weighing, pressure testing, pressure control, sensor data acquisition, industrial automation field instruments, etc., where it is necessary to convert the tiny analog signal output by the bridge sensor into a standard analog signal. [0003] At present, the traditional bridge sensor analog signal amplifier device such as figure 1 As shown, the sensor analog signal amplifier must be calibrated with the sensor before use. Its human-computer interaction selector switch and two potentiometers are used for calibrating the sensor. During calibration, select the gain range of the amplifier by selecting the switch according to the sensitivity of the sensor, then adjust the gain adjustment potentiometer to finely adjust the amplificati...

AI Technical Summary

Problems solved by technology

[0010] For this reason, the technical problem to be solved by the present invention is that in the prior art, the sensor analog signal amplifier mainly adopts a hardware circuit, and the human-computer interaction circuit is difficult to use. Because it is a selection switch and a potentiometer on the hardware, the user cannot give a user prompt when using it. information, and the accuracy after calibration is directly affected by the professionalism of the calibration personnel and the accuracy of the test instrument

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