Description

The A4504V is an IC chip belonging to the Electronic Component category. It is a TDA4504B model with the capability of demodulating Intermediate Frequency (IF) signals that have either positive or negative-going video information. This IC chip has a 32-pin encapsulation which includes a three-stage vision IF amplifier, mute circuit, Automatic Frequency Control (AFC), and Automatic Gain Control (AGC) circuitry. Its design includes fully synchronized horizontal and vertical timebases with drive circuits and an integral three-level sandcastle pulse generator, making it possible to realize a functional color television receiver with the addition of a tuner, audio demodulator and amplifier, chroma decoder, and respective line and field deflection circuitry.

Specifications and features

• Gain controlled vision IF amplifier
• Synchronous demodulator for negative and positive demodulation
• AGC detector operating on peak sync amplitude for negative demodulation and on peak white level for positive demodulation
• Tuner AGC
• AFC circuit with two control polarities and on/off-switch
• Video preamplifier
• Video switch to select either the internal video signal or an external video signal
• Horizontal oscillator and synchronization circuit with two control loops
• Vertical synchronization (divider system), ramp generator and driver with automatic amplitude adjustment for 50 and 60 Hz
• Transmitter identification (mute)
• Sandcastle pulse generation
• VCR/auto VCR switch
• Start-up circuit
• Vertical guard

Application Scenarios

The A4504V IC chip is suitable for use in electronic devices that require demodulating IF signals, especially in functional color television receivers. The design of the chip makes it easy to build a color TV receiver by the addition of a tuner, audio demodulator and amplifier, chroma decoder, and respective line and field deflection circuitry. Its wide range of features, including gain controlled vision IF amplifier, synchronous demodulator, AGC detector, video preamplifier, horizontal oscillator, and synchronization circuit, make it ideal for use in various applications in the electronics industry.

Comparison

• Can demodulate both positive and negative-going video information
• Includes a three-stage vision IF amplifier for enhanced signal processing
• Synchronous demodulator for precise demodulation
• Wide range of features including AGC detector, video preamplifier, and horizontal and vertical synchronization circuits

• Requires the addition of a tuner, audio demodulator and amplifier, chroma decoder, and respective line and field deflection circuitry to build a functional color television receiver