Hello all,
I've got an assignment in which I have to sketch out the outputs of various circuit designs. The circuits are displayed below. Each input (point A) is being driven by a sine wave with a period of one millisecond, centered at zero volts. Circuit #1's input is a sine wave with a period of one millisecond, oscillating between +1 and -1 volt. Circuits #2 and #3 have sine wave inputs with a period of one millisecond, oscillating between +5 and -5 volts.
The purpose is to sketch the outputs at each of the marked points (B, C, D) in the three corresponding circuits.
Now, I have been able to figure some things out for this assignment...
Circuit #1: Point B experiences a gain of -10; the voltage swings between -10V and +10V. Point C experiences a gain of -400, assuming a 25Ω resistance in the transistor. However, this gain is not constant, and that's where I'm having trouble figuring out the output.
Circuit #2: From the output of the op-amp around to ground is a voltage divider with part C in the middle... the divider has a gain of 5.
Circuit #3: The capacitor-resistor is a differentiator. It's also a high-pass filter with an f-3dB point at about 159 Hz. If I'm correct, at part B we should have an output graph of what looks like a cosine wave oscillating between +5V and -5V (centered about zero) with a period of 1 ms.
That's all I have at the moment. In summary, point B of Circuit #2, point C of all three circuits, and part D of Circuit #3 are the ones on which I'm not sure. Any help?
I've got an assignment in which I have to sketch out the outputs of various circuit designs. The circuits are displayed below. Each input (point A) is being driven by a sine wave with a period of one millisecond, centered at zero volts. Circuit #1's input is a sine wave with a period of one millisecond, oscillating between +1 and -1 volt. Circuits #2 and #3 have sine wave inputs with a period of one millisecond, oscillating between +5 and -5 volts.
The purpose is to sketch the outputs at each of the marked points (B, C, D) in the three corresponding circuits.
Now, I have been able to figure some things out for this assignment...
Circuit #1: Point B experiences a gain of -10; the voltage swings between -10V and +10V. Point C experiences a gain of -400, assuming a 25Ω resistance in the transistor. However, this gain is not constant, and that's where I'm having trouble figuring out the output.
Circuit #2: From the output of the op-amp around to ground is a voltage divider with part C in the middle... the divider has a gain of 5.
Circuit #3: The capacitor-resistor is a differentiator. It's also a high-pass filter with an f-3dB point at about 159 Hz. If I'm correct, at part B we should have an output graph of what looks like a cosine wave oscillating between +5V and -5V (centered about zero) with a period of 1 ms.
That's all I have at the moment. In summary, point B of Circuit #2, point C of all three circuits, and part D of Circuit #3 are the ones on which I'm not sure. Any help?
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