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TDA5744 Folha de dados(PDF) 9 Page - NXP Semiconductors |
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TDA5744 Folha de dados(HTML) 9 Page - NXP Semiconductors |
9 / 20 page 1998 Mar 09 9 Philips Semiconductors Preliminary specification Low power mixers/oscillators for hyperband tuners TDA5744; TDA5745 TEST AND APPLICATION INFORMATION Fig.4 Voltage gain (GV) measurement in the VHF band. (1) N1 is 2 × 5 turns. (2) N2 is 2 turns. The gain is defined as the transducer gain plus the voltage transformation ratio (Tloss) of the transformer. Zi >> 50 Ω⇒ Vi =2 × Vmeas; Vi =80dBµV. Vo =V’meas + 16 dB (transformer ratio and transformer loss); GV =20log N1 N2 -------- 5 = V o V i ------ handbook, full pagewidth 50 Ω 50 Ω V e Vmeas RMS voltmeter spectrum analyzer Vi signal source MGK828 D.U.T. VHFIN IFOUT1 IFOUT2 50 Ω Vo V'meas C T (1) N1 (2) N2 Fig.5 Voltage gain (GV) measurement in the UHF band. (1) N1 is 2 × 5 turns. (2) N2 is 2 turns. The gain is defined as the transducer gain plus the voltage transformation ratio (Tloss) of the transformer. Vi =Vmeas; Vi =70dBµV. Vo =V’meas + 16 dB (transformer ratio and transformer loss); Gv = 20 log + 1 dB (1 dB = correction for hybrid loss). N1 N2 -------- 5 = V o V i ------ handbook, full pagewidth Vi 50 Ω 50 Ω V e Vmeas RMS voltmeter signal source 50 Ω A B C D HYBRID D.U.T. UHFIN1 IFOUT1 IFOUT2 UHFIN2 spectrum analyzer MGK829 50 Ω Vo V'meas C T (1) N1 (2) N2 |
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Descrição semelhante - TDA5744 |
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