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AD5539JQ bảng dữ liệu(PDF) 11 Page - Analog Devices |
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AD5539JQ bảng dữ liệu(HTML) 11 Page - Analog Devices |
11 / 16 page AD5539 –11– REV. B value of RLAG, the higher the noise gain). For example, with a 220 Ω R LAG and a 50 Ω source resistance, the noise gain will be 12.8, because the source resistance affects the noise gain. Figures 31 and 32 show the small and large signal responses of the circuit of Figure 29. Figure 31. The Small-Signal Pulse Response of the Gain of 3 Follower Circuit with RLAG and CLEAD Compensation to Pin 12; Vertical Scale: 50 mV/div; Horizontal Scale: 5 ns/div Figure 32. The Large-Signal Pulse Response of the Gain of 3 Follower Circuit with RLAG and CLEAD Compensation to Pin 12; Vertical Scale: 200 mV/div; Horizontal Scale: 5 ns/div A Video Amplifier Circuit with 20 dB Gain (Terminated) High gain applications (14 dB and up) require only a small lead capacitance to obtain flat response. The 26 dB (20 dB termi- nated) video amplifier circuit of Figure 33 has the response shown in Figure 34 using only approximately 0.5-1 pF lead ca- pacitance. Again, a small CLEAD can be connected, either to the output or to Pin 12 with very little difference in response. Figure 33. A 20 dB Gain Video Amplifier for 75 Ω Systems Figure 34. Response of the 20 dB Video Amplifier In color video applications, the quality of differential gain and differential phase response is very important. Figures 35 and 36 show a circuit and test setup to measure the AD5539’s response to a modulated ramp signal (0-90 IRE p-p ramp, 40 IRE p-p modulation, 4.4 MHz). Figures 37 and 38 show the differential gain and phase response. |
Số phần tương tự - AD5539JQ |
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Mô tả tương tự - AD5539JQ |
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