BH7802K

Video ICs Single chip Hi-Fi audio signal processor BH7802K The BH7802K incorporates the functions for a VHS audio signal processing system on a single chip. The circuits on the chip are a peak-noise reduction processor (PNR), an FM modulator / demodulator circuit, an I / O switcher, an automatic FM detector circuit, an FM bandpass filter, and a regulator circuit. Applications VCR S Features 1) Operates off dual ± power supply which allows a large reduction in the number of coupling capacitors required. A built-in regulator makes it easy to construct a power supply system. 2) A two-line I2C bus control decoder circuit is provided, allowing the various IC modes to be set using serial control. 3) A four line input switcher is included (tuner, BS, and line 1 / 2). The output switcher can switch between STEREO, LEFT, and RIGHT, and Hi-Fi, MIX, and NORMAL, and a BS MONITOR function is also provided. The MIX AMP is AV-LINK compatible. 4) The PNR processor and FM modulator / demodulator circuit have reversed characteristics at recording and playback. In addition, the adjustment for carrrier frequency and FM deviation / playback level are common. 5) The built-in bandpass filter excels at attenuation of other channels, and can be directly coupled to the playback amplifier. The FM recording output block has a high-performance low-pass filter to produce sine wave output. 6) Slope-control-type FM-switching-noise compensation circuit. 7) Envelope detector circuit and noise-detector-...