TSH343_07 Datasheet, PDF (13/17 Pages) STMicroelectronics – 280MHz single-supply triple video buffer

TSH343
Application information
3.3
Delay between channels
Figure 30. Measurement of the delay between each channel
5V
600mV
+ +6dB
75Ω
75Ω Cable
Vin
75Ω
600mV
+ +6dB
75Ω
75Ω Cable
V1
75Ω
V2
75Ω
600mV
+ +6dB
75Ω
75Ω Cable
V3
75Ω
The delay between each video component is an important aspect in high definition video
systems. To properly drive the three video components without any relative delay, the
TSH343 dice layout has a very symmetrical geometry. The effect is direct on the
synchronization of each channel, as shown in Figure 31. There is no delay between
channels when the same V_in signal is applied on the three inputs. Note that the delay
between the inputs and the outputs is 4ns.
Figure 31. Relative delay between each channel
Vcc=5V
Load=150Ω
-4ns -2ns 0s 2ns 4ns 6ns 8ns 10ns 12ns 14ns 16ns 18ns 20ns
Time
13/17