Description:

The NTE1604 is an integrated circuit in a 16–Lead SIP type package designed for use in FM car stereo receivers. This device features versatile muting characteristics and allows receiver designers to realize the muting performance according to their design concept.

Features:

• Versatile Mutings

a. When Muting Operation is Performed under a Weak Signal Strength, an Attenuation Slope of the Audio Output Against the Input Signal Strength Varaitions can be Set at any Given value

b. Maximum Muting Attenuation can be Selected Between about 6dB to 40dB

c. Input Signal Strength level which Actuates the Muting Circuit can be Set Freely

• High Limiting Sensitivity (25dbµ Typ. with Muting OFF) Provides a Fine Quieting Characteristic

• High Signal–to–Noise Ratio: 78dB Typ

• Low Distortion (0.05 Typ) Available, if used with Double–Tuned Circuits

• Good AM Rejection Ratio (63dB with 6 Stages of Differential IF Amplifiers)

• Signal Merter Drive Output Proportional to the Input Signal Strength in dB

• Clamped (±VBE) AFC Output, Bandwidth Adjustable

• Delayed AGC Output for Front End Circuit

Functions:

• IF Amplification/Limiter

• AFC Output

• Muting Bandwidth

• Quadrature Detector

• Signal Meter Output

• Muting Under Weak Signal Strength

• AF Preamplifier

• AGC Output