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參數(shù)資料
| 型號： | GT4122 |
| 英文描述： | Trimmable Two Input Analog Mixers |
| 中文描述： | 微調(diào)兩個輸入模擬調(diào)音臺 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 387K |
| 代理商： | GT4122 |
520 - 44 - 00
Once the board has been set up using the above procedures,
other tests such as Linearity and Differential Gain and Phase
can be performed.
Photograph 7 shows the input and output triangle waveforms
slightly offset from each other. This clearly shows the excellent
linearity of the GT4122 control characteristics. The CONTROL
signal itself is a 1V peak to peak triangle wave.
Photograph 7. Comparison of Input and Output Triangle Wave
The output signal (top trace, Photo 7) indicates less than 1%
non-linearity over the control range. Photograph 8 shows a
closer view of the output signal with a vertical scale of 20 mV/
div.
Tracking of the control characteristics from one device to
another indicates approximately 1 IRE variation is possible
making the GT4122 suitable for R-G-B and multi-signal mixing
systems.
Photograph 8. Close Up View of Output Triangle Wave
5
μ
s / div
5
μ
s / div
1
1 3 5 10
FREQUENCY (MHz)
Fig. 4 Typical dg / dp Plot
0.03
0.02
0.01
0.00
-0.01
-0.02
-0.03
dp
dg
Differential gain and differential phase can be accurately
measured using a Network Analyser and S-parameter test set.
Vectorscopes do not provide enough accuracy at the
component level.
Under software control, an input carrier is stepped from a zero
volt DC level to a 0.714V DC level and back again many times.
The resulting changes in gain and phase at the output are
averaged over a long time period by taking several hundred
samples.
The results of this test method, with accuracies of better than
0.001% and 0.001 degree, form the basis of all differential gain
and phase tests at GENNUM.
Appendix A is a program listing used in the HP-4195 Network
Analyser to measure differential gain and differential Phase.
This method is now becoming a standard with component
manufacturers.
An earlier methodology is fully described in Information Note
No. 510 - 14 which forms part of the GENNUM IC Data Book.
Figure 4 shows a typical plot of Differential Gain and Differential
Phase versus Frequency using the Network Analyser method.
DIFFERENTIAL GAIN AND PHASE MEASUREMENTS
2
d
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GT4122-CDF | Analog Multiplier |
| GT4122-CKF | Analog Multiplier |
| GT4123ACDA | Analog Multiplier |
| GT4123ACKA | Analog Multiplier |
| GT4123-CDA | Analog Multiplier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GT4122-CDF | 制造商:Rochester Electronics LLC 功能描述: 制造商:Gennum Corporation 功能描述: |
| GT4122-CKF | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:GT4122 Video Multiplier |
| GT4123 | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Two Channel Video Multipliers |
| GT4123/A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Trimless Two Input Analog Mixers |
| GT4123A | 制造商:GENNUM 制造商全稱:GENNUM 功能描述:Two Channel Video Multipliers |
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