描述 Description

GENERAL DESCRIPTION
The TEA6823T together with the TEA6811T and the TEA6825T together with the TEA6810T form an AM/FM electronic tuned car radio in a double conversion receiver concept.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 adjustment and THD compensation
? Level, multi-path 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 with interface to enable direct data transfer to radio front-end
? IF-count for AM and FM
? Reference frequency generation for PLL synthesizer.Stereo decoder
? Adjustment-free PLL VCO
? Pilot depending mono/stereo switching
? Analog control of mono/stereo blend
? Adjacent channel noise suppression (114 kHz)
? Pilot cancelled
? 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 adjustment and THD compensation
? Level, multi-path 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 with interface to enable direct data transfer to radio front-end
? IF-count for AM and FM
? Reference frequency generation for PLL synthesizer.Stereo decoder
? Adjustment-free PLL VCO
? Pilot depending mono/stereo switching
? Analog control of mono/stereo blend
? Adjacent channel noise suppression (114 kHz)
? Pilot cancelled
? Analog control of de-emphasis
? Integrated low-pass filters for 190 kHz adjacent channel interferences and signal delay for interference absorption circuit.