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.