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BF1208D Datasheet(PDF) 5 Page - NXP Semiconductors |
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BF1208D Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 22 page BF1208D_1 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 01 — 16 May 2007 5 of 22 NXP Semiconductors BF1208D Dual N-channel dual gate MOSFET 8. Dynamic characteristics 8.1 Dynamic characteristics for amplifier A (1) ID(B); RG1 =68kΩ. (2) ID(B); RG1 =86kΩ. (3) ID(B); RG1 = 100 kΩ. (4) ID(A); RG1 = 100 kΩ. (5) ID(A); RG1 =86kΩ. (6) ID(A); RG1 =68kΩ. VGG = 5 V: amplifier A is off; amplifier B is on. VGG = 0 V: amplifier A is on; amplifier B is off. Fig 2. Drain currents of MOSFET A and B as a function of VGG Fig 3. Functional diagram VGG (V) 05 4 23 1 001aag356 8 12 4 16 20 ID (mA) 0 (1) (2) (3) (4) (5) (6) 001aac205 RG1 VGG G1B G2 G1A DB S DA Table 8. Dynamic characteristics for amplifier A[1] Common source; Tamb =25 °C; VG2-S =4V; VDS =5V; ID = 19 mA; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit |yfs| forward transfer admittance f = 100 MHz; Tj =25 °C26 31 41 mS Ciss(G1) input capacitance at gate1 f = 100 MHz [2] - 2.1 2.6 pF Ciss(G2) input capacitance at gate2 f = 100 MHz [2] - 3.4 - pF Coss output capacitance f = 100 MHz [2] - 0.8 - pF Crss reverse transfer capacitance f = 100 MHz [2] -30 - fF Gtr transducer power gain BS =BS(opt); BL =BL(opt) f = 200 MHz; GS = 2 mS; GL = 0.5 mS 32 36 40 dB f = 400 MHz; GS = 2 mS; GL = 1 mS 28 32 36 dB f = 800 MHz; GS = 3.3 mS; GL =1mS 24 28 33 dB NF noise figure f = 11 MHz; GS = 20 mS; BS = 0 S - 3.0 - dB f = 400 MHz; YS =YS(opt) - 0.9 1.5 dB f = 800 MHz; YS =YS(opt) - 1.1 1.7 dB |
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