NJM2267 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Fabricante

NJM2267

DUAL VIDEO 6dB AMPLIFIER WITH 75Ω DRIVER

Japan Radio Corporation  

NJM2267

 SAG correction circuit

SAG correction circuit is a circuit to correct for low-frequency attenuation by high-pass filter consisting of the output coupling

capacitance and load resistance. Low-frequency attenuation raises the sag in the vertical period of the video signal.

Capacitor for Vsag (Csag) is connected to the negative feedback of the amplifier. This Csag increase the low frequency gain

to correct for the attenuation of low frequency gain.

Example SAG collection circuit

Vout

Cout

resistance:RL

Vout1

Vsag

Csag

Example of not using sag compensation circuit

Vout

resistance:RL

Cout

Vout1

Vsag

Waveform of Vout terminal and Vout1 terminal

using SAG correction circuit

Waveform of Vout

not using SAG correction circuit

Waveform of Vout

Waveform of Vout1

Waveform of Vout1

1Vertical period

-6-

1Vertical period

Ver.2016-06-06

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