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STW81102 bảng dữ liệu(PDF) 14 Page - STMicroelectronics

tên linh kiện STW81102
Giải thích chi tiết về linh kiện  Multi-band RF frequency synthesizer with integrated VCOs
PDF  43 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STW81102 bảng dữ liệu(HTML) 14 Page - STMicroelectronics

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Typical performance characteristics
STW81102
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3
Typical performance characteristics
The phase noise is measured with the Agilent E5052A Signal Source Analyzer. All the
closed-loop measurements are done with fSTEP=200 KHz setting properly the fPFD and the
Charge Pump current. The loop filter configuration used is depicted in the paragraph 8
(Application Diagram) and the Reference Clock signal is at 76.8 MHz with phase noise of -
135dBc/Hz @1KHz offset, -145dBc/Hz @10KHz offset and -149.5dBc/Hz of noise floor.
Figure 3.
VCO A (Direct output) open loop
phase noise
Figure 4.
VCO B (Direct output) open loop
phase noise
Figure 5.
VCO A (Direct output) closed loop
phase noise at 3.6GHz
(FSTEP=200KHz; FPFD=200KHz;
ICP=3mA)
Figure 6.
VCO B (Direct output) closed loop
phase noise at 4.3GHz
(FSTEP=200KHz; FPFD=200KHz;
ICP=4mA)
1. 2 ° r m s
1.4° rms



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