Question

Notify Me Bookmark

Assume VDD = 1.2 volt, Vth1 = 0.2 volt and Vth 2 = −0.3 volt. Determine the maximum value of Vout for which the gain of the diode-connected CS amplifier is 6 . Next, if the gain is increased to 7, then find the maximum value of Vout. Hint: Equation 3.37 on page 56 of the textbook. [Marks 3]

Assume VDD = 1.2 volt, Vth1 = 0.2 volt and Vth 2 = −0.3 volt. Determine the maximum value of Vout for which the gain of the diode-connected CS amplifier is 6 . Next, if the gain is increased to 7, then find the maximum value of Vout. Hint: Equation 3.37 on page 56 of the textbook. [Marks 3]

Image text
  1. Assume V D D = 1.2 volt, V th 1 = 0.2 volt and V th 2 = − 0.3 volt. Determine the maximum value of V out for which the gain of the diode-connected CS amplifier is 6 . Next, if the gain is increased to 7, then find the maximum value of V out. Hint: Equation 3.37 on page 56 of the textbook. [Marks 3]

Detailed Answer

0 0

Please enter your email here. You will get email when this question is answered by our tutor.

Doubtrix Logo

Problem is not yet solved!

Click on Notify me to get email when question is answered.

Join Doubtrix with 7-days free trial

  • Icon Correct & Verified Answers
  • Icon No AI-Generated Answers
  • Icon Video Solution for Difficult Questions
  • Icon Work With Experts to Reach at Correct Answers
Notify me Login Sign Up

Similar/Related Questions

The circuit in Figure 1 is a seif-biased current mirror/source. Assume all pMOS transistors, M1, M2, M3, and M4 are the same size, Le. (W/L)M1 = (W/L)M2 = (W/L)M3 = (W/L)M4 ha. Assume VDD = 1.8 V. Neglect the body-effect (γ = 0) and channel-length modulation effect (λ = 0) for DC bias calculations. 1. Size all the transistors for VON = 0.1 V for Iref = Iout = 25 μA. 2. Determine the value of R. 3. What is the maximum value of Vout for this circuit to work properly? 4. Determine the output resistance Rout. Assume L = 1 μm. For this part, λ is not neglected. Figure 1 Self-biased current mirror
Solution
0 0

Cascode Stage. Design a Cascode amplifier shown in figure below to achieve a gain of 1600. Assume VDD = 1 V, Vth = 0.3 V, λn = 0.2 V−1, γ = 0, μnCox = 100 μA/V2, I1 = 1 mA, gmro ≫ 1. a) Find bias point (VGS−Vth of transistors) to achieve the target gain such that we achieve maximum swing at Vout. b) Find W/L for each transistor. c) Calculate optimal Vb and VIN DC bias to maximize output swing. What is this maximum/minimum voltage levels at the output? What is the maximum swing? d) Notice you must generate a specific Vb externally to maximize the swing. If a lazy designer decides to connect Vb to VDD instead, what would be the swing in this case? e) To realize the current source load, we will use a PMOS active load. For PMOS, use the same parameters with λp = 0.2 V−1, μpCox = 50 μA/V2. Assume the bias current will remain at 1mA, find the new gain value. What would be the W/L for PMOS if we want to have a VOD(VGS−Vth) of 0.1V for this device. f) Repeat part (e) for a PMOS load with 2L gate length. g) It seems like making the PMOS load very large (large W) is beneficial to reduce VOD and consequently improving the voltage swing. What do you think is the drawback?
Solution
0 0

A differential amplifier with a single-ended output is shown below along with the MOSFET parameters. The amplifier is to be designed for a differential mode gain of 10 and a CMRR of 200 . The current source I must have a voltage drop VCS ≥ 1 volt. The voltage V0 = 0 when the MOSFET gates are at ground potential (Va = Vb = 0). Assume the current source I must have a voltage drop of at least Vcs, min = 1 V. MOSFET Parameters kn = 2×10−4 A/V2 Vt = 1 V;VA = 30 V a. Show that the single-ended differential gain can be expressed as Ad = gmro||RD/2 = Ad = kn I VDD(1 + VDD/VA). Hint: Express gm, RD, and ro as functions of the drain current 1 /2. b. Use the result of step #1 to find the required bias current I. c. What should be the value of RD ? d Find the required value of Rss. e. What is the maximum differential input voltage Vid for linear operation. f. What is the common mode input voltage range?
Solution
0 0