M52749FP Просмотр технического описания (PDF) - Renesas Electronics

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M52749FP

BUS Controlled 3ch Video Pre-amp for CRT Display Monitor

Renesas Electronics 

M52749FP

FC1 Frequency Characteristics1 (f = 50 MHz)

First, SG3 to 1 MHz is as input signal. Input a resister that is about 2 kΩ to offer the voltage at input pins (2, 6, 11) in

order that the bottom of input signal is 2.5 V.

Control the main contrast in order that the amplitude of sine wave output is 4.0 VP-P.

Control the brightness in order that the bottom of sine wave output is 2.0 VP-P.

By the same way, measure the output amplitude when SG3 to 50 MHz is as input signal.

The measured value is called VOUT (33, 38, 41). Frequency characteristics FC1 (33, 38, 41) is calculated by the

equation below:

FC1

=

20log

Output

amplitude

VOUT VP-P

when inputted SG3

(1

MHz):

4.0

VP-P

(dB)

∆FC1 Frequency Relative Characteristics1 (f = 50 MHz)

Relative characteristics ∆FC1 is calculated by the difference in the output between the channels.

FC1' Frequency Characteristics1 (f = 180 MHz)

Measuring condition and procedure are the same as described in FC1, expect SG3 to 180 MHz.

∆FC1' Frequency Relative Characteristics1 (f = 180 MHz)

Relative characteristics ∆FC1' is calculated by the difference in the output between the channels.

FC2 Frequency Characteristics2 (f = 180 MHz)

SG3 to 1 MHz is as input signal. Control the main contrast in order that the amplitude of sine wave output is 1.0 VP-P.

By the same way, measure the output amplitude when SG3 to 150 MHz is as input signal.

The measured value is called VOUT (33, 38, 41).

Frequency characteristics FC2 (33, 38, 41) is calculated by the equation below:

FC2

=

20log

Output

amplitude

VOUT VP-P

when inputted SG3

(1

MHz):

4.0

VP-P

(dB)

∆FC2 Frequency Relative Characteristics2 (f = 180 MHz)

Relative characteristics ∆FC2 is calculated by the difference in the output between the channels.

C.T.1 Crosstalk1 (f = 50 MHz)

Input SG3 (50 MHz) to pin 2 only, and then measure the waveform amplitude output at OUT (33, 38, 41).

The measured value is called VOUT (33, 38, 41). Crosstalk C.T.1 is calculated by the equation below:

VOUT (33, 38)

C.T.1 = 20log

(dB)

VOUT (41)

C.T.1' Crosstalk1 (f = 180 MHz)

Measuring condition and procedure are the same as described in C.T.1, expect SG3 to 180 MHz.

C.T.2 Crosstalk2 (f = 50 MHz)

Input SG3 (50 MHz) to pin 6 only, and then measure the waveform amplitude output at OUT (33, 38, 41).

The measured value is called VOUT (33, 38, 41). Crosstalk C.T.2 is calculated by the equation below:

VOUT (33, 41)

C.T.2 = 20log

(dB)

VOUT (38)

C.T.2' Crosstalk2 (f = 180 MHz)

Measuring condition and procedure are the same as described in C.T.2, expect SG3 to 180 MHz.

REJ03F0194-0201 Rev.2.01 Mar 31, 2008

Page 13 of 26

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