This TDA1072A integrated AM receiver circuit performs the active and part of the filtering functions of an AM radio receiver. TDA1072A is intended for use in mains-fed home receivers and car radios. The circuit design can be used for oscillator frequencies up to 50 MHz and can handle r. f. signals up to 500 mV. R.F. radiation and sensitivity to interference are minimized by an almost symmetrical design. The voltage-controlled oscillator provides signals with extremely low distortion and high spectral purity over the whole frequency range even when tuning with variable capacitance diodes. When required, band switching diodes can easily be applied. Selectivity is obtained using a block filter before the i.f. amplifier. The figure of the circuit is shown by the figure below;
The feature of TDA1072A is;
The inputs protected against damage by static discharge. Gain-controlled r.f. stage. Separately buffered, voltage-controlled and temperature-compensated oscillator, designed for simple coils. Internal generation of a.g.c. voltage with possibility of second-order filtering. Buffered field strength indicator driver with short-circuit protection.
The feature of TDA1072A is;
The inputs protected against damage by static discharge. Gain-controlled r.f. stage. Separately buffered, voltage-controlled and temperature-compensated oscillator, designed for simple coils. Internal generation of a.g.c. voltage with possibility of second-order filtering. Buffered field strength indicator driver with short-circuit protection.
