Surround sound circuit
The surround sound system can reproduce rich on-site information and form a sense of surrounding the audience, so that the listener feels like being on the scene and obtains a more realistic listening effect.
The surround sound effect is obtained through a special surround processing circuit.
There are currently three popular surround sound processing methods: one is the 4-4-4 split system. When recording music programs, the system records the sound information of the front left, front right, rear left, and rear right on four tracks such as audio tapes. When reproducing, the original channel signals are reproduced. . Such a system is complicated and expensive, and it is difficult to promote it. The second one is the encoding method 4-2-4 system, which is mostly used in the Dolby surround sound film return system in stereo cinemas. It has been gradually used in home audio equipment, called Dolby logic surround sound, but the price is not low. , Working-class enthusiasts are still more difficult to access. The third type is called 2-2-4 quasi surround sound system, and its processing method is: the left and right channel signals of the two-channel stereo are subjected to composite mute processing and then played back as the front left and front right signals. At the same time, another group of signals is separated and processed by the surround sound processing system to generate analog surround signals, which are sent to the surround sound box for playback. Surround sound is produced in this way, which is more common in low-end and mid-range combination sounds.
Circuit principle:
Component selection:
The Schottky Diode is another type of semiconductor diode which can be used in a variety of wave shaping, switching and rectification applications the same as any other junction diode. The main adavantage is that the forward voltage drop of a Schottky Diode is substantially less than the 0.7 volts of the conventional silicon pn-junction diode.
Schottky diodes have many useful applications from rectification, signal conditioning and switching, through to TTL and CMOS logic gates due mainly to their low power and fast switching speeds.
the Schottky Diode also known as a Schottky Barrier Diode is a solid-state semiconductor diode in which a metal electrode and an n-type semiconductor form the diodes ms-junction giving it two major advantages over traditional pn-junction diodes, a faster switching speed, and a low forward bias voltage.
The metal–to-semiconductor or ms-junction provides a much lower knee voltage of typically 0.3 to 0.4 volts compared against a value of 0.6 to 0.9 volts seen in a standard silicon base pn-junction diode for the same value of forward current.
Variations in the metal and semiconductor materials used for their construction means that silicon carbide (SiC) Schottky diodes are able to turn [ON" with with a forward voltage drop as little as 0.2 volts with the Schottky diode replacing the less used germanium diode in many applications requiring a low knee voltage.
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