Always be advancea intptrisifrof,'r". (2) always be retarded in phase from 1". (3) be advanced in phase at low frequencies and retarded at high frequencies. (a) be advanced in phase at high...

63 70 kn R2 750 kn R3 +24 V 50 kn I. ond Ip ore o-c signol Bose-fo-emitter signol input (nof volues d-c volues). resistonce IOOO J1-. of Q2 is Fig. 89 -.' .J'. !_ (l) always advancea be intptrisifrof,'r". (2) always phase be retarded in from 1". (3) be advanced in phase low frequencies at and retarded at high frequencies. (a) be advanced in phase at high fteluencies and retarded at low frequencies \ Referring to Fig. 89, the phase amount of shift between /. and /a will (l) be the same at (Hint: all frequencies. App Ex 9 #l) (2) ,. be,minimum T"m'rro ' at low frequencies and highest at high frequencies. (3) be minimum at high frequencies and maximum at low frequencieg, q.I".t 1dq4 (a) be maximum at low and high frequencies and minimum at intg.r-' mediate frequencies 4. 6. In Fig. 89 minimum phase shift betv.veen ,I" and /r occuri when (l) the signal/. is weak. (2) the signal /" is strong. , (3) the reactance at lowest. of C is its (4) the reactance of C is at its highest. (5) the magnitude ^fa is much of less than the magnitude of 1.. 1 If in Fig. 89 .16 is phase shifted in by 45e from.Ia, what is the approxi- mate reactance of capacitator C| (Study the circuit to see what values are not needed for an approximate answer. Also, see App. Ex. 1, #3.) -7000 (1) (3) 4s,000o -1000c, -70,0000 (2) (4) 8. Transistor in Fig. 90 has a constant-current signal output /" of Qr l0 mA. You may assume the input impedances to the FET's to be to i1n' infinite. With respect to the phase relationship between signal volt-I I 64 I I I t t I Fig. 90 (Hiryt;lgnore Ct. Construct 2 phasor ages Vadld V'7, diagrams, I -one with CrRr, the other with C3R2. Compare V'a nleads Q) (2) Vector V*, with V"r.) UalagsV'a t What 9. is the approximate value of phase the angle between Va and V,a in Fig. 90? Consider the collector voltage of to be the reference Qr ,1,ra\W voltage. Draw a phasor diagram for both Va and V';. I (l) 0" (3) 60' (5) 90' I (2)...