Physics 517/617 HOMEWORK III Due Oct 27
... 3) Show that the RMS current in the 1 kΩ resistor is 6.5 mA. If the AC voltage source was replaced by a battery what would the current in the resistor be? ...
... 3) Show that the RMS current in the 1 kΩ resistor is 6.5 mA. If the AC voltage source was replaced by a battery what would the current in the resistor be? ...
ee.eng.usm.my
... A transistor is to be biased at a collector current of 1 mA when a 12-V power supply is applied. Using the above figure, determine the values of R1, R2, and RE if 3.4 V is to be dropped across RE and if the current through R2 is to be 10 IBQ. Assume that for the transistor used, VBEQ = 0.6 V and hFE ...
... A transistor is to be biased at a collector current of 1 mA when a 12-V power supply is applied. Using the above figure, determine the values of R1, R2, and RE if 3.4 V is to be dropped across RE and if the current through R2 is to be 10 IBQ. Assume that for the transistor used, VBEQ = 0.6 V and hFE ...
TDA7000 RX FM Receiver
... should be a dual log type potentiometer. The balance control is a single 47k linear potentiometer, which at center adjustment prevents even attenuation to both left and right input signals. If the balance control is moved towards the left side, the left input track has less resistance than the right ...
... should be a dual log type potentiometer. The balance control is a single 47k linear potentiometer, which at center adjustment prevents even attenuation to both left and right input signals. If the balance control is moved towards the left side, the left input track has less resistance than the right ...
Transceptor PULGA
... transmitting the power must be near the maximum. For better manipulation C3 can be altered, but the reception point will also move. These adjustments are easy and intuitive. The oscillation frequency in transmission and reception will be different in about ...
... transmitting the power must be near the maximum. For better manipulation C3 can be altered, but the reception point will also move. These adjustments are easy and intuitive. The oscillation frequency in transmission and reception will be different in about ...
Serious ‘XM (That’s W2XM) presents
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
Serious `XM (That`s W2XM) presents
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
... Operation of the game is almost intuitive, and you can make up your own rules. Each numeric point value on either game board is a hyperlink which reveals a question. Advancing the game one slide past the question (by clicking the screen) displays the answer. “Back” on the answer slide returns you t ...
EC6401-EC II -model exam
... 2. An amplifier has a voltage gain of 1000. With negative feedback, the voltage gain reduces to 10. Calculate the fraction of the output that is feedback to the input. 3. What are the advantages and disadvantages of RC phase shift oscillators? 4. Crystal oscillators possess high degree of frequency ...
... 2. An amplifier has a voltage gain of 1000. With negative feedback, the voltage gain reduces to 10. Calculate the fraction of the output that is feedback to the input. 3. What are the advantages and disadvantages of RC phase shift oscillators? 4. Crystal oscillators possess high degree of frequency ...
Low Frequency Receiver Circuit
... opamp with the first stage as a voltage follower of unity gain, and the second stage with gain (R1 + R2 )/R1 ≈ 101 in this example. The output of this amplifier may be fed directly to an oscilloscope to monitor tuning of the LC circuit and the antenna. The RF amplifier is capacitively coupled to a d ...
... opamp with the first stage as a voltage follower of unity gain, and the second stage with gain (R1 + R2 )/R1 ≈ 101 in this example. The output of this amplifier may be fed directly to an oscilloscope to monitor tuning of the LC circuit and the antenna. The RF amplifier is capacitively coupled to a d ...
Some Thoughts on Regenerative Receivers
... then there are either two or three coils that have to be switched. This means at least a three-pole n-throw switch if there is a "primary" coil to the antenna. Three of the six coil points are "ground" for RF, so only a three pole switch is needed. If a coupling adjustment capacitor is placed on the ...
... then there are either two or three coils that have to be switched. This means at least a three-pole n-throw switch if there is a "primary" coil to the antenna. Three of the six coil points are "ground" for RF, so only a three pole switch is needed. If a coupling adjustment capacitor is placed on the ...
Regenerative circuit
The regenerative circuit (or regen) allows an electronic signal to be amplified many times by the same active device. It consists of an amplifying vacuum tube or transistor with its output connected to its input through a feedback loop, providing positive feedback. This circuit was widely used in radio receivers, called regenerative receivers, between 1915 and World War II. The regenerative receiver was invented in 1912 and patented in 1914 by American electrical engineer Edwin Armstrong when he was an undergraduate at Columbia University. Due partly to its tendency to radiate interference, by the 1930s the regenerative receiver was superseded by other receiver designs, the TRF and superheterodyne receivers and became obsolete, but regeneration (now called positive feedback) is widely used in other areas of electronics, such as in oscillators and active filters. A receiver circuit that used regeneration in a more complicated way to achieve even higher amplification, the superregenerative receiver, was invented by Armstrong in 1922. It was never widely used in general receivers, but due to its small parts count is used in a few specialized low data rate applications, such as garage door openers, wireless networking devices, walkie-talkies and toys.