The internal circuit of SHM1100 II

SHM1100Ⅱ is packaged in a single row of 12 pins, with a frequency response of 10H to 200kHz. Its peripheral circuit is simple and
its working reliability is high. The internal circuit principle is shown in Figure 2-104.
    As can be seen from the figure, the circuit is a direct-coupled desktop OCL circuit with differential input. Among them, VTs and VTg are
the overload and short-circuit protection circuits of the output tube, and VT12 and VT13 are the noise control circuits . The maximum output power of
    SHM 1100Ⅱ is 100w, and the power supply voltage range is ±12V～±50v. The frequency response
is 10Hz~200kHz, the distortion is 0.01%, the input impedance is 33k{/, and it has overload, short-circuit protection and noise suppression functions.