Consider the PMOS amplifier bias circuit below. Resistors RS and RD must set the drain current and drain voltage to the values in the table. The transistor parameters are also in the table. Perform the following calculations. Ignore λ. a. Calculate the value of RD. b. Calculate the magnitude of the overdrive voltage |VOV|. c. Calculate the source-to-gate voltage VSG. d. Calculate the value of RS.
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![Consider a BJT differential amplifier biased with a Widlar current source, as shown in Figure 4. The transistor parameters are: β = 200, VBE(ON) = 0.7 V (except for Q3 and Q4), VA = ∞ for Q1 and Q2, and VA = 100 V for Q3 and Q4. Reverse saturation current, Is for transistor Q3 and Q4 is given as 1×10−15 A. From analysis, it is determined that I1 = 0.5 mA, la = 400 μA, v1 = v2 = 0 V, VCE2 = 2.7 V and CMRR (dB) = 80 dB Figure 4 a) Calculate the value of resistors R1, R2 and RC. b) Find the amplifier's differential-mode voltage gain (Ad), common-mode voltage gain (ACM) and common-mode output resistance ( Ricm ). [Ricm ≈ (1+β)Rocs where Rocs is the output resistance of the current source ] c) Draw the pnp version for the differential amplifier of Figure 4. Clearly label all resistors and currents.](https://www.doubtrix.com/uploads/editor/6551442834FjRRsYNstK.jpg)
