Y(s) X(s) = K₂ (1+ K1 ' + SKD') S

QI Ref RG RM A1 Vou VOUT Digital A DACI Input, DIN VDAC Figure QI Figure QI shows the circuit used to condition the output of the n- bit Digital to Analog Converter "DACI" having a digital input value of Dw. DACI may be assumed to have a voltage output with zero source resistance coded in "straight binary" such that • For a binary input of Dy = 000...000 the output voltage vaac is 0 V • For a binary input of Dw = 111..111 the output voltage vaac is Vn Where Vg is a positive voltage reference. Neglecting Ry and assuming that opamp Al is ideal, show that the output voltage v, is (а) OUT R. for D, - 000000 R (i) Vay- ref (ii) Vor for D,-111..111 Hence choose values of Ro and R to give an output voltage range -V Svar S (iii) Re-draw Figure Q1 to show all sources of DC opamp error and say why they have the signs you have given them. (b) Hence derive an expression for the emor in vug due to opamp DC input cur. and voltage errors including both bias and offset currents. (c) If the two…