ML1490 Datasheet (LANSDALE Semiconductor) - RF/IF/Audio Amplifier Wideband Amplifier

ML1490, RF/IF/Audio Amplifier Wideband Amplifier

OF SPEECH COMPRESSOR The amplifier drives the base of a PNP transistor operating common *emitter with a voltage gain of approximately 20.

The control R1 varies the quiescent Q point of this transistor so that varying amounts of signal exceed the level Vr.

Diode D1 rectifies the positive peaks

www.DataSheet4U.com ML1490 RF/IF/Audio Amplifier Wideband Amplifier With AGC Legacy Device: Motorola MC1490 The ML1490 is an integrated circuit featuring wide range AGC for use in RF/IF amplifiers and audio amplifiers.

High Power Gain: 50 dB Typ at 10 MHz 45 dB Typ at 60 MHz 35 dB Typ at 100 MHz Wide Range AGC: 60 dB Min, DC to 60 MHz 6.0 V to 15 V Operation, Single Polarity Supply Operating Temperature Range TA = 40° to +85°C Note: See

ML1490 Features

* The emitter

* follower Q2 drives the AGC Pin 5 of the ML1490PP and reduces the gain. R3 controls the slope of signal compression. Table 1. Distortion versus Frequency Frequency 100 Hz 300 Hz 1.0 kHz 10 kHz 100 kHz Distortion 10 mV ei 3.5% 2% 1.5% 1.5% 1.5% 100 mV ei 12% 10% 8% 8% 8% Distorti