Principle of Negative Voltage Generation Circuit Diagram In electronic circuits, we often need to use negative voltage. For example, when using operational amplifiers, we often need to establish a negative voltage. Below, we will briefly discuss the circuit that converts +5V to -5V as an example. When negative voltage is required, dedicated negative voltage generation … Read more
1. Inverting SummationOperational Amplifier The inverting summation is relatively simple and can be understood as the superposition theorem. Uo=-(R3/R1+R3/R7+R3/R5)*2, the factor of 2 is because the negative terminal voltages are equal; if they are not equal, each needs to be multiplied accordingly. PS: I basically haven’t forgotten this. Simulation Result 2. Non-Inverting SummationOperational Amplifier The … Read more
Electrochemical gas detection elements require a constant bias to operate accurately, which can consume a significant amount of power. When the device is in idle or sleep mode, normal power management systems often attempt to keep these devices turned off. However, electrochemical sensors may take tens of minutes or even hours to stabilize. Therefore, the … Read more
Before we start the article, let’s test everyone~ How many of the following five circuit diagrams can you understand? TDA2030 Circuit Diagram 34063 Circuit Diagram 555 Circuit TDA2030 Circuit Diagram Transistor Discrete Component Circuit If you can understand these circuit diagrams, you have already entered the field of electronic design. If not, let’s start learning … Read more
The failure caused by capacitor damage is the highest in electronic devices, especially with the failure of electrolytic capacitors being the most common. Capacitor damage manifests as: reduced capacity, complete loss of capacity, leakage, and short circuit.Capacitors play various roles in circuits, and the faults they cause are also characterized differently: in industrial control circuit … Read more
Background The core algorithm of the product I have been researching these days is the phase difference detection of the sine signals transmitted and received. On the STM32F407 processor, high-speed sampling of the received and transmitted signals is performed through DMA+SPI communication. An algorithm is designed to calculate the phase difference between the received and … Read more
Introduction: This article discusses the potential interference from high-frequency electromagnetic waves in electronic signal processing circuits in practice. These situations are often omitted in ordinary classrooms and textbooks. The additional peripheral resistors and capacitors that seem unrelated to ordinary signal processing play a crucial role in ensuring circuit stability. Therefore, while encountering problems may cause … Read more
Zhang Weifeng1, Zhang Yanhui2, Luo Huan1 (1. Shenzhen Information Vocational Technology College, Guangdong Shenzhen 518172; 2. ZTE Corporation, Guangdong Shenzhen 518057) Abstract: This paper proposes an AC detection circuit based on integrated operational amplifiers. The circuit consists of a voltage attenuation circuit, differential operational amplification and synthesis circuits, voltage zero-crossing detection, and frequency detection circuits. … Read more
How many of the five circuit diagrams below can you understand? TDA2030 Circuit Diagram 34063 Circuit Diagram 555 Circuit TDA2030 Circuit Diagram Transistor Discrete Component Circuit Now that you have looked at these circuit diagrams, can you understand how each circuit operates? If you can, congratulations, you have entered the world of electronic design. If … Read more
Most MCU pins cannot measure negative voltage. Therefore, to achieve the collection of both positive and negative voltages, the circuit shown in Figure 1 can be used. This circuit converts negative voltage to positive voltage, and the specific principle is as follows. Figure 1 According to the virtual short concept, we can set the voltages … Read more