The NTE1764 is an infrared preamplifier in a 14Lead DIP type package and contains four main parts: the gaincontrolled amplifier I, the amplifier II, the pulseseparating amplifier III, and the inverter IV. The amplifier I has a wide dynamic range and thus ensures interference free operation, also at bright ambient light, 50Hz modulated light originating from fluorescent lamps, or at intensive infrared light, e.g. produced by infrared sound transmission. It is also possible, to approach almost directly the remotecontrol transmitter to the receiver without producing misfunction by overdriving the receiver. The amplifier II further amplifies the signal, and amplifier III separates the pulseshaped intelligence signal from noise and other unwanted parts. The inverter IV provided additionally inverts the output signal available at Pin7 as negative pulse, and thus delivers positive output pulses at Pin8. If an additional resistor is inserted between Pin6 and GND, the noiseimmunity is increased, but the input sensitivity decreased. Pin10 serves as test pin and must not be connected. The capacitor connected from Pin2 to GND influences the automatic gain control of amplifier I contained in the NTE1764. A capacitance of less than 1F will cause misfunction in the distance range of 0.2, to 2m.