Tag：Voltage
-
Time：2021-1-8
1、 Common semiconductor devices 1.1 intrinsic semiconductor Pure semiconductor, semiconductor with crystal structure Conducting depends on free electrons, valence electrons are not conducting 1.2 carriers Particles carrying conductive action 1.3 intrinsic excitation Definition: valence electrons break away from covalent bonds and produce free electrons and holes When the electric field is applied, the holes will […]
-
Time：2020-12-11
At present, the charging management IC on the market is designed according to the charging characteristics of rechargeable batteries. According to different charging media, rechargeable batteries can be divided into Ni MH batteries, Li ion batteries, etc. Because lithium battery has no memory effect, it is used in all kinds of handheld devices and portable […]
-
Time：2020-11-24
Back to the catalog 1. Basic working principle The main structure of class A and B power amplifiers (class AB) is similar to class B power amplifiers, but it can eliminate the crossover distortion of class B power amplifiers. The corresponding cost is to increase a little static power consumption, so its efficiency is slightly […]
-
Time：2020-11-12
Back to the catalog Operational amplifier(operational amplifier)Operational amplifier(OP AMP) is an integrated amplifier, which is characterized by a very large voltage gain (usually more than tens of thousands), high input impedance and low output impedance. The reason why the word “operation” should be added before its name is that the device was […]
-
Time：2020-11-9
Back to the catalog The inverse amplifier and in-phase amplifier can realize the function of multiplication operation. In this section, we will see how to use the operational amplifier to realize the addition and subtraction operation. 1. Addition circuit The circuit of addition operation is shown in the figure below. The output voltage is the […]
-
Time：2020-11-9
0 summary Due to the need of a project, weak voltage signal needs to be collected, and the voltage accuracy is required to be high. Therefore, mcp3421, an 18 Bit high-precision IIC AD conversion chip, is selected. In this paper, combined with the manual of mcp3421, the use of the chip is explained in detail, […]
-
Time：2020-10-29
Back to the catalog Since the current and voltage of the capacitor are integral / differential, the capacitance can be used to do integral and differential operations. Although inductance can also be used to do calculus, but because of its large volume, and the actual value of inductance device is not easy to accurately control, […]
-
Time：2020-10-26
Back to the catalog With the characteristic that the output of ideal operational amplifier can output any voltage and any current, we can use ideal operational amplifier to build a variety of controlled power supply. Of course, in practical use, the output of op amp should not exceed the maximum value given in its data […]
-
Time：2020-10-24
Back to the catalog As an ideal amplifier, op amp is widely used in small signal measurement. This section introduces two common measurement circuits. 1. Micro voltage measurement For the measurement of micro voltage (several millivolts), in today’s digital technology has been very developed, basically not a problem. Using an operational amplifier and an in-phase […]
-
Time：2020-9-30
High density MRAM has very low power, high read speed, very high data retention and durability, which is suitable for a wide range of applications. The unit area is only 0.0456 square micrometer, the reading speed is 10ns, the reading power is 0.8ma/mhz/b, and the leakage current is less than 55mA at 25C in low […]
-
Time：2020-7-16
In this paper, spiking-yolo is proposed, which is the first successful attempt of pulse neural network in the field of target detection. It achieves the same performance as convolution neural network, but its energy consumption is very low. The content of the paper is novel and cutting-edge. It is recommended for you to read Source: […]
