BF198 SIEMENS | Alldatasheet

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. @5C D MM 8235605 OOO444b 8 MMSIEG. . NPN Silicon RF Transistor .___. __25C_04446 _ 0 Brigg T-3/- 20 STEMENS AKTIENGESELLSCHAF for gain-controlled TV IF amplifier stages BF 198 is an NPN silicon planar radio-frequency transistor in TO 92 plastic package (10 A 3 DIN 41868). The transistor is characterized by a low reverse transfer capacitance and is recommended for use in gain-controlled IF amplifier stages of TV sets in common- : . emitter configuration. : Type Ordering code aunt 35 max. BEC : BF 198 | 062702-F354 =r oe Bs 4 . Thal 5.2.4 52a : ‘Approx. weight 0.26 g Dimensions in mm . Maximum ratings Collector-emitter-voltage Veto 30 Vv ’ Collector-base voltage Veso 40 v , Base-emitter voltage Veso 4 v . Collector current Ie 26 mA Base current Ih 3 mA Junction temperature uj 150 °c Storage temperature range Teg -56 to+150 | °C Total power dissipation (Tam $ 25°C) Prot 500 mw Thermal resistance : | | Junction to ambient air Rina | $250 KW - 492 .

1869 A-02

25C D MM 8235605 OOO4447 T MMSIEG © 7 -3/-o2/ H 250 04447 > BFi98 | i Static characteristics (Tam = 25°C) : Collector cutoff current : (Vea = 40V) Ieao <100 nA i DC current gain . (og = 10 V; Ig = 4 mA) hee 70 {>26) - (Vee = 3 V; Ig = 10 mA) hee >10 - Base-emitter voltage (Vce = 10 V; Ie = 4 mA) Vee 750 mV Dynamic characteristics (Tamp = 25°C) i Transition frequency : (Veg = 10 V; Ie = 4 mA; f = 100 MHz) fr 400 MHz 2 Reverse transfer capacitance (Vog = 10 V; Ig = 1 mA; f = 1 MHz) -Ci2e 0.22 pF Noise figure . (og = 10 V; Ig = 4 mA; f= 35 MHz;Ry= 1000) NF 3 dB Obtainable power gain (Woe = 10 V; Ic = 4 mA; f = 35 MHz) Gpeopt? | 42 4B : Four-pole characteristics: (Voz = 10 V; Ic = 4 mA; f = 35 MHz) , O10 = 4.5 mS | (20 = 47 pS | Tate] = 105 mS | 9220 = 40 pS Cite = 40 pF “pie = 95° ~ pate = 20° C2207 1.3 PF 1) Gooens =H 493 1870 A-03 . .

_ 25C D MM 8235605 COO4448 1 MMSIEG - 7 3/. 2/ _25C 04448 OD BF 198 ‘Total perm. power dissipation Roar Collector currant Ic = f (lp) mW mA 600, By CITT oe ee al . ‘ so LETTE ke poeee ee ae CONE t co a A el a to CONC ERE es LING st ASE ' NY a 7 a wo TENET FYE REE : LON CA I oA he ao TON TTT ta : LET EN TY PACE EEE a . eo LUN st ; COC EEE EERE \\ ar LETTE LETT TEN (EEE EEE EEE % Ey La 0 7000 7000 pA : a oe mew Ig = (Vee) Qutput charectertatios Ig=t (Vee) : COLLECT Po Co ‘ CEE HAE ae ETE 5 ok sae FEE f COREE re t HA oo HT (LCCC “AI AE on HHT TT Pry rier} ne W/4).9 40eneee ' LTT TTT Try | HA LOCC Cera onl /ecanauunane COCCCCcAce Ace eo HH OCC HA COCCHI See EL | : Hee Cyr ia ; a EEC s Seussusaleree <a ZEEE HEH HEH 0 05 Ov 0 0 Pi) wv ae —~Vee 494 .

1871 A-04

| aS¢ D mm 8235605 OO0K449 3 MESIEG’. —7- 3/—2/ _ 2 1. 25 04449 OF Briss! ‘Transition frequency fr = f (Jc) ‘Short-circuit forward transfer Vee ™ parameter admittance Yate = (Vc) ie as Vee = parameter; f= 35 MHz 500, 150, t LI : f f 5 $80) } | | CCC rere Ing y { «Ll CERES COPA EAT i LAPT SAE t LEAT AN ETT i YTN N NE COT ACTTAT NTT 350 \\ mE AN CCEA ACNE HA sol ACCENT LEVY TNIAT TT ‘ CANCE EAC COONAN : au wolf AE A LOVETT NTN : HRHA-HA-HE-H f NI a B Pn TUTTE NTT TEN GN fe CALCUL E - ce ro *OENCCCCINCLEN A CEACECESCLEED \\ N EEE EEE PCN sof EE WETTING IT POCee ere y . chet | (EEC ol LTT TT PS TTT : 2 4 6 mJ 1 2mA 0 5 0 Fi 15mA } iA ek Power gain control range Constant power gain characteristics $64 Mae ee Fo eo ko - yd parotar: t= 30, sv hare 5 Br ae CO Nl 7° k AL “ane EH COATT, . pr) 7) ruta it gupa sees CCC . i V5 -na +H \\| CTY AA TT rr . COAT sie | =| 2 oN ee a | My CH eee 8 LE, Fee cesea a ae 40 UAE LUT Wf eta ae WAG NSS LETT HOSS EEES EEE : Resenaaooas oreo LETTE TY 6. 0 0 20 wv 4B Me a os 495 .

1872 A-05 :

"asc > mm 8235605 GOOWNSO T mstee 2 7 3/-2/ ~ 25€_ 04450 0: BF 198 _ SIEMENS AKTIENGESELLSCHAF Control renge of power gata MBps = ich: Re + Re = 1k0; ~Veg = 20; 1= 38.4 MHz Reverse transfer capacitance Cras = f Vee); Ie = 1m A; f= 1 MHz eh TIENT * Coo IN wo LETT N TTT “ue AEE HHH HEPC t “AEE ao HUTT ANT wT TT TTT WN [hi TTT TTT a HEN aN TTT TTT LA LT NEE ETT olf TTA ol EAA Ps SERREAUSUOOEEANI SER RS ee ® of TTT] off EP TR LE] LT ETT TT Ere | . ao CECCECCECTTET EN COOCATE e. : Mey, i First stage of a TV IF amplifier incl. voltage gain controt f = 36.4 MHz. : ot ng BF 198 bi ) me af m2 Sonn Sos [| ue aS osu : cad i" Y) 00pF OnF on] foo . Vee : Power gain (Ic = 4 mA; 7 —Veg = 26 V; Re + Re = 3.9 kQ) . @, | 26 | dB . Gain control range 4G, 60 dB