gmrs amplifier

, called Neper. When the gain is calculated in terms of voltage rather than power, the Joule law (Joule's law,p=v2/r) is used, and the formula is: Gain =10xlog10 ((V22/R)/(V12/R)) DB =10XLOG10 ((V2/V1) 2) DB =20XLOG10 (V2/V1) DB This formula is correct only if the load impedance is equal (impedance matched). In many modern electronic equipment, because of low output impedance and high input impedance, the load can be ignored without significantly affecting the calculation result

Application of Linear photocoupler in current sampling Abstract: This paper introduces the working principle of hcnr200, a new precision linear photocoupler device, and provides two separate transmission circuits for detecting motor current using hcnr200 and an operational amplifier, the calculation method of the peripheral resistance is derived.Key words: Linear photocoupler; linear isolation; analog signal; Application 1 IntroductionIn modern electr

, SINGLEHEIGHT/2, SINGLEHEIGHT/4, paint); Paint.reset (); Write for (int i = 0; i Here we do a change in two places: (1), when drawing a circle Circle if ( -1 = mchoose) { Paint.setcolor (Color.parsecolor ("#888888")); } else { Paint.setcolor (Color.parsecolor ("#fa7829")); } Paint.setstyle (Paint.Style.FILL); Paint.setantialias (true); Canvas.drawcircle (width/2.0f, SINGLEHEIGHT/2, SINGLEHEIGHT/4, paint);When you draw a circle, you set the fill color of the circle according to w

I. Analog Circuit 1. What is the content of kilhov's theorem? (Shi LAN Microelectronics) Kilhov's current law is a law of Charge Conservation, that is, the charge flowing into a node in a circuit is equal to the charge flowing out of the same node. Kilhov's law of voltage is a law of conservation of energy, that is, the sum of the circuit voltage in a loop is zero. 2. Flat capacitor formula (C = ε s/4 π kD ). (Unknown) 3. The most basic characteristics, such as the transistor curve. (Unknown) 4.

input signal power. As long as the power amplifier is large enough, a high field strength can be generated. This greatly improves the sensitivity of GTEM Chamber shielding attenuation Measurement and is a method suitable for measuring high shielding attenuation of four shielded cables.2. Why should we use the GTEM chamber method instead of the absorption clamp method to measure the four shielded cables?In the measurement of shielding attenuation of R

their applications. (Shi LAN Microelectronics)5. Negative Feedback types (voltage feedback, current feedback, voltage feedback and current feedback); negative feedback advantages (reducing the gain sensitivity of the amplifier, changes the input and output resistors, improves the linearity and nonlinear distortion of the amplifier, and effectively extends the passband of the

Source: blog China Today, computers are moving towards multimedia and intelligent development, while speakers are an important part of multimedia devices. It can be said that speakers are the most direct computer peripherals in addition to displays, its quality directly affects the effect of multimedia computers. The following describes some common troubleshooting methods for multimedia speakers: When the speaker does not sound or only one sound, first check whether the power supply and connecti

The input resistor is a performance indicator used to measure the influence of the amplifier on the signal source. The larger the input resistor, the smaller the current obtained from the signal source, and the larger the signal voltage obtained from the amplifier input end, that is, the less the signal source voltage attenuation. Theoretical Basis: US = (RS + Ri) × I. RS indicates the internal resistance o

wall from the air, the direction changes. Total Noise Level The background noise level emitted by the speaker when no sound signal is input. The total noise level of the system is related to audio engineering quality, sound system design, audio system debugging, and audio equipment. Noise Waste Control It is also known as equal sound control, which is a control method used to compensate the human ears for being sensitive to the middle voice and being slow to the bass and tweeter. It doe

, the Wavelink series high-bandwidth differential probes from the Force branch are representative of this type of probe.　　2. Differential probe with high common-mode rejection ratioWhat is the common-mode rejection ratio, in short, is the differential amplifier circuit in the signal common-mode component of the suppression ability, which is defined as the amplifier to the differential mode signal voltage ma

ASIC and the mask programming array. Some manufacturers provide various analog unit circuit libraries that they have already created models. After connecting the unit circuit, they can meet the user's application requirements. Over the years, manufacturers and users have believed that by selecting the unit circuit in the unit circuit library, it is easier to match the required analog IC. Or, more specifically, it is better to pick an Operational Amplifier