TDA4661 Overview
TDA4661 The TDA4661 is an integrated baseband delay line circuit with one line delay. It is suitable for decoders with colour-difference signal outputs ±(R−Y) and ±(B−Y). V V UNIT 7.0 − − − − 6.3 6.3 +0.4 +0.4 mA mV mV V V dB dB dB dB ±(R−Y) input signal PAL/NTSC (peak-to-peak value;.
TDA4661 Key Features
- Two b filters, using the switched-capacitor technique, for one line delay time (64 µs)
- Adjustment-free application
- No crosstalk between SECAM colour carriers (diaphoty)
- Handles negative or positive colour-difference input signals
- Clamping of AC-coupled input signals (±(R-Y) and ±(B-Y))
- VCO without external ponents
- 3 MHz internal clock signal derived from a 6 MHz CCO, line-locked by the sandcastle pulse (64 µs line)
- Sample-and-hold circuits and low-pass filters to suppress the 3 MHz clock signal
- Addition of delayed and non-delayed output signals
- Output buffer amplifiers