A circuit structure for industrial printer analog voltage output

Abstract

The utility model relates to a kind of circuit structure for industrial printer analog voltage output, to solve the problem that existing circuit is difficult to accurately output 0V voltage and output voltage stability is poor, including: operational amplifier U50-B and operational amplifier U50-C;Resistance R48, resistance R45 and resistance R46;Capacitor C24;Diode D2;Output interface J11 and power supply;Wherein, input signal source DAC1 is connected to the noninverting input terminal of operational amplifier U50-B by resistance R48;Operational amplifier U50-B constitutes noninverting proportional amplification circuit, its output end is connected to the inverting input terminal by the feedback network consisting of R45 and R46, and is connected to output interface J11 to realize analog voltage output;Power supply is connected to the power supply pin of operational amplifier U50-C by capacitor C24;Diode D2 separates GND and GND_POWER.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment circuits, specifically a circuit structure for analog voltage output of an industrial printer. Background Technology

[0002] During the operation of industrial equipment, it is often necessary to accurately output analog voltage signals to downstream devices to achieve functions such as equipment control and monitoring. Existing analog voltage output circuits have many problems. For example, they are affected by the operational amplifier input offset voltage, making it difficult to accurately output 0V voltage; and they have poor output voltage stability when faced with power fluctuations and interference, failing to meet the high-precision operation requirements of industrial equipment. Therefore, there is an urgent need for a circuit that can stably and accurately output analog voltage. Utility Model Content

[0003] The present invention aims to provide a circuit structure for analog voltage output of industrial printers, so as to solve the problems of existing circuits having difficulty in accurately outputting 0V voltage and poor output voltage stability, and to provide stable and accurate analog voltage signals for back-end equipment.

[0004] The technical solution adopted in this utility model is as follows:

[0005] This utility model discloses a circuit structure for analog voltage output in an industrial printer, comprising: operational amplifier U50-B and operational amplifier U50-C; resistors R48, R45, and R46; capacitor C24; diode D2; output interface J11; and power supply. The input signal source DAC1 is connected to the non-inverting input of operational amplifier U50-B via resistor R48. Operational amplifier U50-B forms a non-inverting proportional amplifier circuit, and its output is connected to the inverting input via a feedback network composed of R45 and R46, and then connected to output interface J11 to achieve analog voltage output. The power supply is connected to the power supply pin of operational amplifier U50-C via capacitor C24. Diode D2 separates GND and GND_POWER.

[0006] As a preferred technical solution, pin 1 of the output interface J11 is connected to the output terminal of the operational amplifier U50-B, and pin 2 is grounded.

[0007] As a preferred technical solution, the power supply is a 12V power supply.

[0008] As a preferred technical solution, the power supply pin of the operational amplifier U50-C is connected to a 12V power supply and capacitor C24.

[0009] Beneficial effects

[0010] Accurate 0V output voltage: By separating two ground potentials through diode D2, the difference in ground potential is used to compensate for the influence of the op-amp input offset voltage on the output, which can achieve an accurate 0V output voltage, meeting the voltage accuracy requirements of industrial equipment.

[0011] High output voltage stability: Capacitor C24 filters the power supply, reducing the impact of power fluctuations on the circuit; at the same time, the unique ground potential adjustment mechanism enables the circuit to maintain stable output voltage when facing external interference, providing a reliable analog voltage signal for downstream devices. Attached Figure Description

[0012] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figure 1 As shown, this utility model discloses a circuit structure for analog voltage output of an industrial printer, including operational amplifiers LM358 (U50-B and U50-C), resistors R48 (1KΩ), R45 (10KΩ), R46 (1KΩ), capacitor C24 (0.1μF), diode D2 (IN4007); output interface J11 and power supply. Pin 1 of the output interface J11 is connected to the output terminal of operational amplifier U50-B, and pin 2 is grounded. The power supply pin of operational amplifier U50-C is connected to a 12V power supply and capacitor C24.

[0015] Its working principle is as follows:

[0016] Input section: Input signal source DAC1, digital DAC chip output voltage range is 0-3V, connected to the non-inverting input terminal (pin 5) of operational amplifier U50-B through resistor R48.

[0017] Amplification and Feedback Section: Operational amplifier U50-B forms a non-inverting proportional amplifier circuit. Its output is connected to the inverting input through a feedback network composed of R45 and R46; on the other hand, it is connected to pin 1 of output interface J11, and pin 2 of J11 is grounded to realize analog voltage output.

[0018] Power supply and filtering section: The 12V power supply is connected to the power supply pin of the operational amplifier U50-C through capacitor C24. C24 acts as a power supply filter to ensure the stability of the op-amp's operating power supply.

[0019] Key protection and potential adjustment section: Diode D2 separates the two grounds, GND and GND_POWER. When the circuit is subjected to interference or power fluctuations, the GND potential changes relative to the GND_POWER potential to compensate for the output deviation caused by the op-amp input offset voltage, ensuring an accurate 0V output voltage.

[0020] Accurate 0V output voltage: By separating two ground potentials through diode D2, the difference in ground potential is used to compensate for the influence of the op-amp input offset voltage on the output, which can achieve an accurate 0V output voltage, meeting the voltage accuracy requirements of industrial equipment.

[0021] High output voltage stability: Capacitor C24 filters the power supply, reducing the impact of power fluctuations on the circuit; at the same time, the unique ground potential adjustment mechanism enables the circuit to maintain stable output voltage when facing external interference, providing a reliable analog voltage signal for downstream devices.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A circuit structure for analog voltage output in an industrial printer, characterized in that, include: Operational amplifiers U50-B and U50-C; resistors R48, R45, and R46; capacitor C24; diode D2; output interface J11; and power supply; wherein, the input signal source DAC1 is connected to the non-inverting input terminal of operational amplifier U50-B through resistor R48; operational amplifier U50-B forms a non-inverting proportional amplifier circuit, and its output terminal is connected to the inverting input terminal through a feedback network composed of R45 and R46, and connected to output interface J11 to realize analog voltage output; the power supply is connected to the power supply pin of operational amplifier U50-C through capacitor C24; diode D2 separates GND and GND_POWER.

2. The circuit structure for analog voltage output of an industrial printer according to claim 1, characterized in that, Pin 1 of the output interface J11 is connected to the output terminal of the operational amplifier U50-B, and pin 2 is grounded.

3. The circuit structure for analog voltage output of an industrial printer according to claim 1, characterized in that, The power supply is a 12V power supply.

4. The circuit structure for analog voltage output of an industrial printer according to claim 1, characterized in that, The power supply pin of the operational amplifier U50-C is connected to a 12V power supply and capacitor C24.

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