EGR-3133 FA26 Homework 2
Due 11:59 pm Tuesday 09/15
1. (2.37) Find the steady state current I(t) in the following circuit, where 𝑅𝑅1 = 𝑅𝑅2 = 100 𝑘𝑘𝑘𝑘,
𝐶𝐶 = 1 𝜇𝜇𝜇𝜇, and 𝐿𝐿 = 20 𝐻𝐻 for
a. 𝑉𝑉𝑠𝑠 = 5 𝑉𝑉 𝐷𝐷𝐷𝐷 [5 points]
b. 𝑉𝑉𝑠𝑠 = 5 𝑐𝑐𝑐𝑐𝑐𝑐(𝜋𝜋𝜋𝜋) 𝑉𝑉 [5 points]
2. (3.1) Sketch the output waveform for 𝑉𝑉𝑜𝑜𝑜𝑜𝑜𝑜 in the following circuit on axes as shown. Assume
the diode is ideal. (5 points)
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3. (3.9) The following circuits are called clipping circuits. Assume ideal diodes and sketch the
output voltage 𝑉𝑉𝑜𝑜𝑜𝑜𝑜𝑜 for two cycles of the input Vin. (10 points)
4. (3.18) In the following circuit, what minimum steady state voltage 𝑉𝑉𝑖𝑖𝑖𝑖 is required to turn the
LED on and keep the transistor fully saturated? Assume that the forward bias voltage for the
LED is 2 V and there is a 0.2 V collector-to-emitter voltage drop when the transistor is
saturated. (5 points)