10.54 An IC CG amplifier is fed from a signal source with Rsig = ro/2, where ro is the MOSFET output resistance. It has a current-source load with an output resistance equal to ro. The MOSFET is operated at ID = 100 μA and has gm = 2 mA/V, VA = 5 V, Cgs = 0.1 pF, Cgd = 10 fF, and Cdb = 10 fF. As well, the current-source load provides an additional 30 fF capacitance at the output node. Find fH.
Find the voltage gain and input resistance of the amplifier in the following circuit. Assume Q1 and Q2 are matched and they have a β = 100.
For the CMOS OP amp shown below, use parameters of vthn = 0.4, vthp = −0.4, μnCox = 100 μA/V2, μpCox = 40 μA/V2, λ = 0.01 V−1 and W/Leff = 200 for hand calculations. The input common mode voltage is 1.25 V and the output common mode voltage is 1.25 V. The W/L ratio of unspecified transistors is 100/1. Set the resistor value so that the bias current M1 is 100 uA. Set the device size of M5 so that there is no systematic offset. The offset is defined as an input voltage to make the output 1.25 V Estimate the small signal voltage gain Estimate the range of input common mode voltage for proper operation Estimate the maximum output swing
For the bipolar amplifier shown below, answer the following questions using β = 100 and VBE = 0.7. The input common mode voltage is 1.6 V. i. What is the DC output common mode voltage? ii. Estimate the low frequency small signal gains, Vo1/V1, Vo2/V1, Vo1/V2, Vo2/V2.
Consider the amplifier in the figure given below, where I1 = 500 μA, R1 = 1 MΩ, I2 = 500 μA, R2 = 1 MΩ, and VCC = VEE = 7.5 V. Use βO = 80, VA = 75 V, KP = 5 mA/V2, and VTP = −1 V. Identify the Q-points of the transistors for the given amplifier. (Check all that apply.)
What are the differential-mode voltage gain and input resistance and output resistance of the amplifier? The differential-mode voltage gain AV = . (Round the final answer to the nearest whole number.) The input resistance Rid = The output resistance ROut = kΩ. (Round the final answer to one decimal place.) Consider the amplifier in the figure given below, where I1 = 500 μA, R1 = 1 MΩ, I2 = 500 μA, R2 = 1 MΩ, and VCC = VEE = 7.5 V. Use βO = 80, VA = 75 V, Kp = 5 mA/V2, and VTP = −1 V.
The desired amplifier characteristic are a voltage gain of 80 dB and an input impedance of 10 kΩ. Select a value for R1. Select a value for R2 that will minimize dc offset error. What is the small-signal bandwidth of the amplifier? What is the gain of the amplifier at fb? What is the gain of the amplifier at 10 kHz?