Knowledge
  • The Principle and Application of Constant Voltage Amplifier

    Date:2018.Oct.29
    Constant voltage amplifier: The output impedance of ordinary power amplifier is very small, generally 8 ohms, not suitable for long distance transmission. The signal voltage output from...
  • Understand the Design of Audio Power Amplifier

    Date:2018.Oct.29
    The function of the audio power amplifier is to amplify the signal input from the sound source and then output the drive speaker. There are many types of sound sources, such as microphones, record players...
  • Echo Problem in Video Conference

    Date:2018.Oct.29
    Once there is an echo in the conference TV network, it is likely that the entire network will have an echo. Therefore, when debugging, be sure to debug the sounds in the main venue together with each sub-site to...
  • What Is Crosstalk and Ringing?

    Date:2018.Oct.29
    Crosstalk: Crosstalk is the interference of one signal by other signals. The principle of action is electromagnetic field coupling. Mutual inductance and mutual capacitance between signal lines can cause noise...
  • The Control Skills of Noise Gate

    Date:2018.Oct.26
    1. What is a noise gate: In recording and rock music, to prevent crosstalk between microphones, in order to capture the best sound, the microphone model selected between various drums and drums is different...
  • What Is Bluetooth5?

    Date:2018.Oct.26
    With the speedup of Bluetooth®5, engineers can easily support high-speed mode with TI's fully certified Bluetooth5 protocol stack for single-mode Bluetooth low-power applications. The Bluetooth® 5 is groundbreaking...
  • The Basic Knowledge of PCB Board Testing

    Date:2018.Oct.26
    1. It is strictly forbidden to use the grounded test equipment to contact the TV, audio, video and other equipment on the backplane to detect the PCB board without the isolation transformer...
  • The Difference Between DSP and DSP Amplifier

    Date:2018.Oct.26
    DSP: DSP is used for tuning, adjusting EQ, delay, frequency cutting, and frequency division. EQ is used to debug the style. For the defects of the speaker, it can be repaired to a certain extent...
  • What Is Supercapacitor Battery?

    Date:2018.Oct.26
    Definition: Supercapacitor battery (Electrical Double-Layer Capacitor) is a new type of energy storage device. It has the characteristics of short charging time, long service life, good temperature characteristics...
  • The Related Knowledge of Impedance Matching

    Date:2018.Oct.26
    1. What is impedance? In electricity, the hindrance to the current in the circuit is often called impedance. The impedance unit is ohms, usually expressed as Z, which is a complex number Z = R + i ( ω L - 1 / (ω C))...
  • The Basic Knowledge of Bluetooth Module

    Date:2018.Oct.26
    1. Data transmission. The Bluetooth module can transmit data through the serial port (SPI, IIC) and MCU control device. The Bluetooth module can be used as a master and a slave. The host is able to search for...
  • What Is Crystal Oscillator?

    Date:2018.Oct.26
    Crystal oscillator, its effect is the initial clock frequency, which is a different bus frequency in the computer after the frequency generator is enlarged or reduced. Taking a sound card as an example...
  • What Is Radio Frequency?

    Date:2018.Oct.25
    Radio Frequency means the electromagnetic frequency that can be radiated into space, ranging from 300KHz to 30GHz. RF radio frequency is RF current, which is an abbreviation of high frequency AC change...
  • What Is Baseband?

    Date:2018.Oct.25
    Baseband: The frequency band (frequency bandwidth) inherent to the original electrical signal transmitted by the Baseband source (information source, also called the transmitting terminal) without modulation...
  • Analysis of the Meaning of Different Capacitors in Different Circuits

    Date:2018.Oct.25
    1. Filter capacitor. It is connected between the positive and negative terminals of the circuit to remove the useless alternating current in the circuit. Generally, large-capacity electrolytic capacitors...
  • The Principle of Echo Cancellation and Noise Suppression

    Date:2018.Oct.25
    In instant messaging applications, real-time voice communication between two parties or multiple parties is required. In high-demand occasions, external speakers are usually used for playback, which will inevitably...
  • How to Eliminate Acoustic Defects in Entertainment Venues?

    Date:2018.Oct.24
    1. Echo. When arranging the two sets of left and right speakers, don't leave too far. The distance difference between the sounds of the two sets of speakers and the listening seats in the hall...
  • What Is the Input Sensitivity?

    Date:2018.Oct.24
    Input sensitivity: This is a voltage concept, indicating the signal voltage at the input when the amplifier reaches full power output. The input sensitivity voltage of a typical power amplifier...
  • What Is the High Pass Filter (HPF)?

    Date:2018.Oct.24
    High pass filter (HPF): In the audio system, sometimes some very low frequency infrasonic signals are mixed in the full audio signal. These subsonic signals are invisible to the human ear, but this signal enters...
  • What Is the Limiter?

    Date:2018.Oct.24
    Limiter: This is one of the protection measures of the power amplifier. When the input voltage of the power amplifier exceeds the input sensitivity voltage, the input signal is limited, so as to avoid...
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