TDA4671/V1中文资料Picture Signal Improvement (PSI) circuit数据手册恩XP规格书

描述 Description

GENERAL DESCRIPTION
The TDA4671 delays the luminance signal and improves colour-difference signal transients. The luminance signal
can also be improved by peaking and noise reduction (coring).FEATURES
• Luminance signal delay from 20 to 1100 ns (minimum step 45 ns)
• Luminance signal peaking with symmetrical overshoots selectable
• Selectable 2.6 or 5 MHz peaking centre frequency and degree of peaking (−3, 0, +3 and +6 dB)
• Selectable noise reduction by coring
• Handles negative as well as positive colour-difference signals
• Selectable Colour Transient Improvement (CTI) to decrease the colour-difference signal transient times to
those of the high frequency luminance signals
• Selectable 5 or 12 V sandcastle input voltage
• All controls selected via the I2C-bus
• Timing pulse generation for clamping and delay time control synchronized by sandcastle pulse
• Automatic luminance signal delay correction using a control loop
• Luminance and colour-difference input signal clamping with coupling capacitor
• 4.5 to 8.8 V supply voltage range
• Minimum of external components.

特性 Features

• Luminance signal delay from 20 to 1100 ns (minimum step 45 ns)
• Luminance signal peaking with symmetrical overshoots selectable
• Selectable 2.6 or 5 MHz peaking centre frequency and degree of peaking (−3, 0, +3 and +6 dB)
• Selectable noise reduction by coring
• Handles negative as well as positive colour-difference signals
• Selectable Colour Transient Improvement (CTI) to decrease the colour-difference signal transient times to
those of the high frequency luminance signals
• Selectable 5 or 12 V sandcastle input voltage
• All controls selected via the I2C-bus
• Timing pulse generation for clamping and delay time control synchronized by sandcastle pulse
• Automatic luminance signal delay correction using a control loop
• Luminance and colour-difference input signal clamping with coupling capacitor
• 4.5 to 8.8 V supply voltage range
• Minimum of external components.