Homemade high-fidelity fever HI-FI amplifier 03

The schematic diagram of the Hi-Fi combination is shown in Figure 5-68. The audio
source (CD, VCD, LD, DVD, etc.)
enters the volume, tone,
balance, equal loudness, and broadening circuit LM1036N through the signal selection switch TDA102 9 of the Hi-Fi combination. In order to make the music
signal expression more natural, more realistic, and closer to the original
taste, the music signal output by LM1036N is input into
BBE2150AD, and the sound effect enhancement and clarity processor intelligently
restores the realistic original sound signal. The signal output by BBE
is High-speed and low-noise dual operational amplifier - "Emperor"
NE5535N (produced by Sig Netics Company of the United States,
better than NE5532N, also known as the American Big S integrated by audiophiles
) amplifies the signal to drive the power amplifier stage TDA1514A
× 2, and the amplified signal is The left and right speakers perform Hi-Fi playback of music.
    Figure 5-69 is a typical application circuit port of the signal input switching switch TDA1029. The TDA1029 is a stereo, four-way high-fidelity
audio source switching integrated product launched by Philips Company for the audio field . It can be used for assembling or replacing the signal selection switch of the power amplifier .     The volume, tone and balance control circuit of this Hi-Fi combination adopt the high-quality tone circuit I.M1036N of National Semiconductor (NS) . LM1036N adopts DC level. Dual-channel integrated circuits that control sound (treble, bass), volume, and balance have long used DC level control . The advantage is that the treble and bass adjustment amounts do not affect each other. The volume potentiometer is made of ordinary domestic products and has no voice, and the control is very smooth. .LM1036N has the characteristics of frequency response compensation, wide range single power supply (9~18V, typical value 12V), high signal-to-noise ratio (input 0.3ms~ 90dB), etc. It is an audiophile-grade integrated circuit. I, M1036N tone control range >15dB , the volume control range is > 80dB, and the distortion is less than 0.03%. Figure 5-70 is a typical application circuit of LM1036N. NE5532N is   a product of Signet-ICS Company in the United States. Its function in the circuit is to amplify the signal by one level and have a broadening effect ( When the T and NEH points are short-circuited, they play a broadening   role. This function is effective for decks) to suit the needs of different sound sources. For music lovers who already own a power amplifier, they   can also use the volume and tone balance circuit of the original power amplifier. Replace it with the circuit in Figure 5-70 to improve the sound quality of the power amplifier.