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TDA6405ATS датащи(PDF) 17 Page - NXP Semiconductors |
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TDA6405ATS датащи(HTML) 17 Page - NXP Semiconductors |
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17 / 32 page ![]() 1999 Jan 13 17 Philips Semiconductors Product specification 5 V mixer/oscillator-PLL synthesizers for hyperband tuners TDA6404; TDA6405; TDA6405A Fig.8 Input circuit for optimum noise figure in the VHF band. (a) For fRF = 50 MHz: VHF mixer frequency response measured = 57 MHz; loss = 0 dB. Image suppression = 16 dB. C1 = 9 pF; C2 = 15 pF. L1 = 7 turns (Ø 5.5 mm; wire Ø = 0.5 mm). I1 = semi rigid cable (RIM): 5 cm long. (semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m). (b) For fRF = 150 MHz: VHF mixer frequency response measured = 150.3 MHz; loss = 1.3 dB. Image suppression = 13 dB. C3 = 5 pF; C4 = 25 pF. I2 = semi rigid cable (RIM): 30 cm long. I3 = semi rigid cable (RIM): 5 cm long (semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m). handbook, full pagewidth MBE286 - 1 L1 C2 C1 PCB plug plug BNC BNC RIM-RIM I1 C4 C3 PCB RIM-RIM I3 I2 (a) (b) F=Fmeas − loss (of input circuit) (dB). Fig.9 Noise figure (F) measurement in the VHF band. handbook, full pagewidth MGL277 VHFIN IFOUT1 IFOUT2 D.U.T. NOISE SOURCE NOISE FIGURE METER BNC RIM INPUT CIRCUIT C T |
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