Greetings all, I'm in the process of preparing for a lab and had some questions concerning the long tail amplifier.
I'm unsure about purpose of the resistors at the collector of T1 & T2. From the datasheet the transistor which is a 2N3904 has a Max Ic rating of 200mA saturation takes place above 50 mA. Are they still used for limiting the current to the collector?
In the other pictures The base of T2 is connected to ground. I've driven the base of T1 with a sine wave of 20 mV with a frequency of 1 kHz. The input signal from the oscilloscope is flat while the output signal resembles a sine wave. Voltage gain at collectors 2.7 V
I gradually increase the peak Voltage and end with a snapshot where the peak voltage is 750 mV. The input signal when compared to the output signal goes from sine to squarish. Voltage gain is now 4.7 V on one end and 0.7 V at the other. Why is the signal going from a sine wave to a square wave?
I'm unsure about purpose of the resistors at the collector of T1 & T2. From the datasheet the transistor which is a 2N3904 has a Max Ic rating of 200mA saturation takes place above 50 mA. Are they still used for limiting the current to the collector?
In the other pictures The base of T2 is connected to ground. I've driven the base of T1 with a sine wave of 20 mV with a frequency of 1 kHz. The input signal from the oscilloscope is flat while the output signal resembles a sine wave. Voltage gain at collectors 2.7 V
I gradually increase the peak Voltage and end with a snapshot where the peak voltage is 750 mV. The input signal when compared to the output signal goes from sine to squarish. Voltage gain is now 4.7 V on one end and 0.7 V at the other. Why is the signal going from a sine wave to a square wave?
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