NTE1214

Integrated Circuit

AM Tuner System

Description:

The NTE1214 is a high integrated circuit in a 16–Lead DIP type package designed for use in the AM

system of high grade receivers. This device contains most of the functions needed for AM receiving.

Functions:

D RF Amplifier

D Frequency Counter

D IF Amplifier

D Detector

D AGC

D Signal Meter Driving

Features:

D RF Amplifier Stage:

Good quieting sensitivity by means of low noise transistors and cascade connecting.

D Frequency Converter Stage:

Splendid spurious characteristics by means of reduction of high frequency distortion in local

oscillation and differential mixer.

D IF Amplifier Stage:

Reasonable distortion by wide output dynamic range.

D Detector Stage:

Low distortion even at deep modulation considering diagonal clip or negative clip.

D AGC Stage:

Wide AGC range and good large input signal characteristics by AGC’d IF and RF amplifier

stage.

D Signal Meter Driving Stage:

Excellent linearity to input signal.

D Others:

Stabilized biasing against supply voltage drifting over all stages. Particularly superior com-

pensation circuit in IF amplifier. Less deterioration of gain, detector output, and distortion in

low supply voltage range in order to get wide supply voltage range (7V* to 16V).

*

Needs to vary peripheral parts and its value of RF and local oscillator stage for the purpose of low

supply voltage operation.