Bilbladder Mixed Division Power Amplifier ----- AN7580 Amplifier

Keywords: AN7580, 6N1, 6N3, Division power amplification circuit The electronic pipe is placed in front of the premium, the high-quality power amplifier made of high quality discrete components or high-quality integrated circuits is a fever pathway for audio enthusiasts. Bilbutite complement each other and complement. Here is a gallstone mix, high and low frequency frequency amplifier. The preamplifier large-scale circuit is used in medium μ double triode 6n3 [g1] to be used as the form of SRPP circuitry, well-rested, small distortion, low output impedance, and is very suitable for transmission grade. The Cathode of G1 is not connected by the capacitance, mainly to increase communication negative feedback. The audio signal is coupled to the gate of G1 to the gate of G1. After the SRPP circuit, the cathode output by G1, after R4, C4, to the electronic divide network. All the way C5, C6, R6, R7 form high-pass network; another way of C7, C8, R9 ~ R11 form low-pass network. G2 is low-frequency amplifier μ double triode 6N1, which is connected to two cathode outputs, strong load capability, high, low frequency signals, respectively, to the same phase of the integrated block of the post-level power amplification group. High, low networks, R6, C7, respectively, and the cathode of G2, and use the positive feedback to improve the signal voltage of the division point. Second, the post-level power amplifier The AN7580DJ is a 25-foot packaged AVA audio power amplification integrated block, built-in four-channel BTL power amplification, perfect protection circuit and excellent dynamic characteristics. When the power supply voltage is 25V, the load is 4 Ω, the power is 45W per channel. Due to its internal effect tube complementary circuit, the sound is warm, and the charm is full. Third, power supply The power transformer is 300W. The secondary high pressure windings are rectified by φ0.31mm enameled wire. The 200V voltage is rectified by QL1 full bridge. After electrolytic filtering, 250V DC voltage supply G1, G2, the filament windings use φ0.7mm enamel line double line and Around 11, the head is connected to the center tap. Direct supply of tube AC filament voltages. This machine uses SRPP circuit and cathode output from the high-rise circuit. The cathode has a higher voltage. In order to protect the bile duct, the cathode is prevented from being asked by the filament, and 100K resistance is used. In order to provide AN7580DJ to provide an enestotive power, double wire with φ1.45mm enamel line and around 32, rectify, high quality capacitive filter, produce a stable 25V DC power amplifier integrated circuit. Be Figure 1 is the same L-channel circuit, the R channel is the same. Figure 2 is a power supply circuit. Figure 3 is a 6N3, 6N1 pin arrangement. Table 1 is the AN7580DJ pin function. Table 2 is the main technical parameters of bile duct. Author: 福福 Be AN7580 chip information seems to be different from the AN7580DJ, for reference only Http://www.delvingware.com/webservices/medialibrary/media/datasheets/9637243_1.pdf