Solution4

# Solution4 - 5.1 Design a resistive-load inverter with R =...

This preview shows pages 1–3. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 5.1 Design a resistive-load inverter with R = 1kg such that VOL = 0.6 V when an enhancement-type nMOS driver transistor has the following parameters: - VDD = 5.0 V - Vm = 1.0 V - 'y: 0.2 V”2 ' l = 0.0 V" ' k' = 22.0 W2 (a). Determine the required aspect ratio, W/L (b). Determine V“ and V” (0). Determine noise margins NM L and NMHr SOLUTION: (a) When Vm = VOL. Vin = VD”: 5.0V, the driver transistor operates in linear region. Using Eq.(5.12) . v —-v ' w [a = 4,91% = ETiZWOI-I ' Vro)V0L ‘ VOLZ] 5—0.6 22x10'6W 2 —=——2s-1 .6—0. 1000 2 L[( )0 6] SolveforWL E=90.1 L (b)When Vin = V1], driver transistor Operates in saturation region. Using Eq.(5.19) Va ‘ V95; =kyﬂ (th ‘me RL L 2 (iv Taking derivative with respect to Vin and set (Wmr —l v“ uvm I de W l ‘—' =k—(VIL'VT0)=_“ RL dig” mm L Rt Thus. 1 V =V +———=1.0+———-——=L5V "— 7" R JEE 1000-22x10*.90.1 [ 1 L L Vin = VI“, driver transistor operates in linear region. Using Eq.(5.24) repeated here: VDD'”V - k. W 2 TﬂL_?Z[2(Hn_VT0)me-Vw ] . . . . . . dvour —_1 Dlﬁerenualmg both Sides wuh respect to Vm and set Wm ' , Vk=Vm 1 GM! , k' W (W (W -——- 0“ =—— 2(Vm-Vm M +2vw-2vm M RL dun Vu‘ﬁu 2 dun Eur-“H 0 a db?” Vh=ﬁﬂ é=k¥l<wrwen+2vm1 1 W Ric'— L L Plug in back to Eq.(5.24) repeated ane to solve for Vm “H = Vro +2Vm — VDD_VM=£E 1 RL 2 L VTﬂ+zvm_m_VT0 Vow—Vow: L V I = 2.122.— “ Vau‘vm 3 W RL'k': s 5 1 =L0+J——-—-—-—-—-——=109V 31000-22x10‘6-90J 1000-22x10'6-90J [ l (C) NML= vIL - V0515 -015 = 0.9 [V] NMH= 11W - v,” = 5.0 - 3.09 =1.91 [V] ...
View Full Document

## This note was uploaded on 04/10/2008 for the course ECE 1238 taught by Professor Kim during the Spring '08 term at Pittsburgh.

### Page1 / 3

Solution4 - 5.1 Design a resistive-load inverter with R =...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online