OBJECTIVE: Study of AM receiver circuit. GENERAL DESCRIPTION:
The TEA 5591A is a 24-pin integrated radio circuit, derived from the TEA 5591 and is designed for use in a AM/FM portable radios and clock radios. The TEA 5591A differs from the TEA 5591 that is has:
Separate IF input pins for Am and FM.
A split-up AM-if stage (for distribute selectivity).
An LED driver indicator. The main advantage of the TEA5591A is its ability to operate over a wide range of supply voltages (1.8 to 15V) without any loss performance. The AM Circuit incorporates:
A double balance mixer.
A 'one pin' oscillator with amplitude control operating in the 0.9 to 30 MHz frequency range.
A split-up IF amplifier.
A detector.
An AGC circuit which controls the IF amplifier and mixer. FEATURES:
LED AM/FM indicator.
A DC AM/FM switch facility.
Three separate stabilizers to enable operation over a wide range of supply (1.8-5 V)
All pins (except pin 10) are ESD protected.
This trainer is single glass-epoxy printed circuit board.
This trainer is mounted on a strong fibre cabinet. POWER SUPPLY: +6 Volts. DIMENSION: 36.5cms x 28cms x 9.5cms. WEIGHT: 750gms. |
