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University of North Carolina, Charlotte Department of Electrical and Computer Engineering
University of North Carolina, Charlotte Department of Electrical and Computer Engineering

EET 2351 Lecture 2 - MDC Faculty Home Pages
EET 2351 Lecture 2 - MDC Faculty Home Pages

... It can be measured from rising edge to rising edge, or from falling edge to falling edge. The first pulse occurs from 23.0ms to 23.5ms, so the pulse width, pw or tp, is 0.5ms. The Duty Cycle, D, is defined as the pulse width divided by the period. ...
Design and Analysis of Two-Stage Operational
Design and Analysis of Two-Stage Operational

... significant progress over the last few years to offer low-power high performance mixed analog building blocks like operational amplifiers (op amp), buffers, comparators, etc.If CMOS technology used in any analog circuit, the total trans conductance would be constant if the transistors at the input a ...
Laboratory 7 Bipolar Transistor Biasing and Small Signal Behavior
Laboratory 7 Bipolar Transistor Biasing and Small Signal Behavior

... lowest setting and by leaving the attenuator knob out. Set the frequency of the signal generator to 1kHz. Now adjust the DC offset until VCE reads 5V on the DMM. Measure the collector current and record the bias point. Measure Vbb using the DMM and compare against the value calculated in the prelab. ...
Improve Your HW101or SB100 Rig
Improve Your HW101or SB100 Rig

... Low transmitter output power, VOX control hard to set, OA2 V18 flashes out when keying rig on CW. Check to make sure the HP23 power supply switch is set for 3OOVDC not 25OVDC. In fact, one should check this first whenever one has problems with the HW101. Final tune control in wrong position on some ...
L43-DynamicElec-Jan10
L43-DynamicElec-Jan10

... Δt = the time interval (in s) ...
Homework 9 - Engineering Class s - University of Southern California
Homework 9 - Engineering Class s - University of Southern California

... (c). A match-terminated amplifier, which is commonly exploited in broadband communication ...
UMX-870-D16-G ULTRA-LOW NOISE COAXIAL RESONATOR OSCILLATOR Features
UMX-870-D16-G ULTRA-LOW NOISE COAXIAL RESONATOR OSCILLATOR Features

... Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Abs ...
Chapter 4 - UniMAP Portal
Chapter 4 - UniMAP Portal

...  If we measure the phase-shift per RC section, each section would not provide the same phase shift (although the overall phase shift is 180o).  In order to obtain exactly 60o phase shift for each of three stages, emitter follower stages would be needed for each RC section. The gain must be at leas ...
Tayloe Mixer
Tayloe Mixer

... Notice that the actual detection bandwidth will be 2 KHz since the lowpass roll off will extend to both sides of the center detection frequency. However, a selection of 01.33 uf will cause the edges to be 3 db down, so the actual selection of C will depend upon a potential trade off in the wide band ...
ω 2 - UniMAP Portal
ω 2 - UniMAP Portal

... It is to be a high-Q circuit when its quality factor is equal or greater than 10. For a high-Q circuit (Q  10), the half-power frequencies are, for all practical purposes, symmetrical around the resonant frequency and can be approximated as ...
Series – Parallel Dc Circuits
Series – Parallel Dc Circuits

IC Technology and Device Models
IC Technology and Device Models

ESD Protection for the SGL-0622Z GPS LNA
ESD Protection for the SGL-0622Z GPS LNA

... enhances the ESD robustness of the circuit. Operationally speaking, the inductor conducts most of the ESD charge to ground, while the diodes conduct the remainder. The inductor value noted below is optimized for 1575 MHz. Inductances for other frequencies can be calculated using the resonance formul ...


... reduces errors due to additional resistance inside the loop. Using modulation and synchronous detection to reduce noise Many precision applications involve measuring a DC light level absorbed or reflected through a sample. While some applications, allow shielding from all ambient light, many other s ...
样章下载
样章下载

... are relevant. Two of the most important to this (very limited) specification are offset voltage drift and gain stability with temperature. We will assume that all initial errors are negligible (rarely the case in practice). The experienced designer would know that most op amps have a very large open ...
Slide 1
Slide 1

0 - 30 v Adjustable voltage, current stabilized voltage supply
0 - 30 v Adjustable voltage, current stabilized voltage supply

Current and Circuits Voltage (V) - mrkearsley.com
Current and Circuits Voltage (V) - mrkearsley.com

... short circuit.  This has a resistance of 0.01 .  At 120 V  this would provide 12000 A of current!!  Lots of heat!! ...
Indroduction to AC Simulation
Indroduction to AC Simulation

... required to specify the Sweep Variable Type and Sweep Type. List the possible Sweep Variable Types and the possible Sweep Types. Use what you have just learned about AC Sweep analysis and about parametric sweeps to examine the effect of the resistor value on the magnitude response. Use the following ...
VALVULATOR I TM
VALVULATOR I TM

... selected low noise 12AX7A tube operates at voltages normally found in the best guitar amplifiers, and incorporates a regulated DC tube filament supply to eliminate hum typically caused by supply noise and filament leakage. ...
Metaphor circuits
Metaphor circuits

... as copper) that allows electrical current to pass easily through one point to another. The current is made up of electrons. This is opposed to an insulator which prevents the flow of electricity through it. ...
High Performance Crystal Radios
High Performance Crystal Radios

... • Consists of many strands of parallel connected, individually insulated wire woven together in a regular pattern. • Each wire alternates between the middle and the outside of the bundle. • Each wire forced to carry about the same current, minimizing skin effect (the tendency for current to flow alo ...
AN-300 Simple Circuit Detects Loss of 4
AN-300 Simple Circuit Detects Loss of 4

... TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguar ...
RC Circuit Decay - Saddleback College
RC Circuit Decay - Saddleback College

... (1) (Charging Circuit equation) C Where R is the resistance value, and C is the capacitance. With the switch, S, in the second position, at 2, we get the following circuit equation: q ! iR ! = 0 (2) (Discharging Circuit equation) C Empirically, if you were to examine the voltage across the capacitor ...
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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.
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