描述 Description

GENERAL DESCRIPTION
The TEA6821T together with the TEA6810T / TEA6811T forms an AM/FM electronic tuned car radio in a double
conversion receiver concept for European, American and Japanese frequency range.FEATURES
General
? FM mixer for conversion from FM IF1= 72.2 MHz to FM IF2= 10.7 MHz
? AM mixer for conversion from AM IF1= 10.7 MHz to AM IF2= 450 kHz
? FM IF gain stage
? Crystal oscillator providing mixer frequencies and references for IF count and stereo decoder
? FM quadrature demodulator with automatic centre frequency adjust and THD compensation
? Level and multipath and noise detectors
? Soft mute
? Stereo noise cancelling and variable de-emphasis
? PLL stereo decoder
? Noise blanker
? AM IF amplifier and demodulator
? I2C-bus transceiver
? IF count for AM and FM
? Reference frequency generation for PLL synthesizer
? Reduced external components
? SW applicable.
Stereo decoder
? Adjustment-free PLL-VCO
? Pilot depending mono/stereo switching
? Analog control of mono/stereo blend
? Adjacent channel noise suppression (114 kHz)
? Pilot canceller
? Analog control of de-emphasis
? Integrated low-pass filters for 190 kHz adjacent channel interferences and signal delay for interference
absorption circuit.

特性 Features

General
? FM mixer for conversion from FM IF1= 72.2 MHz to FM IF2= 10.7 MHz
? AM mixer for conversion from AM IF1= 10.7 MHz to AM IF2= 450 kHz
? FM IF gain stage
? Crystal oscillator providing mixer frequencies and references for IF count and stereo decoder
? FM quadrature demodulator with automatic centre frequency adjust and THD compensation
? Level and multipath and noise detectors
? Soft mute
? Stereo noise cancelling and variable de-emphasis
? PLL stereo decoder
? Noise blanker
? AM IF amplifier and demodulator
? I2C-bus transceiver
? IF count for AM and FM
? Reference frequency generation for PLL synthesizer
? Reduced external components
? SW applicable.
Stereo decoder
? Adjustment-free PLL-VCO
? Pilot depending mono/stereo switching
? Analog control of mono/stereo blend
? Adjacent channel noise suppression (114 kHz)
? Pilot canceller
? Analog control of de-emphasis
? Integrated low-pass filters for 190 kHz adjacent channel interferences and signal delay for interference
absorption circuit.