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BA7658AFS Datasheet(Hoja de datos) 10 Page - Rohm

No. de Pieza. BA7658AFS
Descripción  Input selector switch for high definition displays
Descarga  13 Pages
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Fabricante  ROHM [Rohm]
Página de inicio  http://www.rohm.com
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 10 page
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10
Multimedia ICs
BA7658AFS
Procedure for measurement of frequency character-
istics and crosstalk characteristics
(1) Frequency characteristics 1
Use an oscilloscope to input a sine wave (VIN = 1.0VP-P,
f = 1MHz / 150MHz) to the color signal input pins. Set
the switch to 1 to select B1, G1 and R1, or to 2 to
select B2, G2 and R2.
Gf1 = Gv (f = 1MHz) – Gv (150MHz) [dB]
(2) Frequency characteristic 2
Use an oscilloscope to input a sine wave (VIN = 1.0VP-P,
f = 1MHz / 230MHz) to the color signal input pins. Set
the switch to 1 to select B1, G1 and R1, or to 2 to
select B2, G2 and R2.
Gf1 = Gv (f = 1MHz) – Gv (250MHz) [dB]
(3) Input pin crosstalk 1
Use an oscilloscope to input a sine wave (VIN = 1.0VP-P,
f = 10MHz) to IN1. Connect IN2 to the ground through
a capacitor. Set the switch to 2, input to IN2, then mea-
sure.
CTI1 = 20log (VOUT / VIN) [dB]
(4) Input pin crosstalk 2
Use an oscillator to input a sine wave (VIN = 1.0VP-P, f =
230MHz) to IN1. Connect IN2 to the ground through a
capacitor. Set the switch to 2, input to IN2, then mea-
sure.
CTI2 = 20log (VOUT / VIN) [dB]
(5) Block crosstalk 1
Use an oscillator to input a sine wave (VIN = 1.0VP-P, f =
10MHz) to G1 and R1. Connect B1 to the ground
through a capacitor. Set the switch to 1 and measure
the B output.
CTB1B = 20log (VOUTB / VING1) [dB]
Similarly,
CTB1G = 20log (VOUTG / VINR1) [dB]
CTB1R = 20log (VOUTR / VINB1) [dB]
(6) Block crosstalk 2
Use an oscillator to input a sine wave (VIN = 1.0VP-P, f =
230MHz) to G1 and R1. Connect B1 to the ground
through a capacitor. Set the switch to 1 and measure
the B output.
CTB2B = 20log (VOUTB / VING1) [dB]
Similarly,
CTB2G = 20log (VOUTG / VINR1) [dB]
CTB2R = 20log (VOUTR / VINB1) [dB]




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