香港考試局
... connected across an a.c. supply. The variations with applied frequency f of the resistance R, the reactance XC of the capacitor, the reactance XL of the inductor and the impedance Z of the circuit are represented in the diagram. Which of the following sequences places the curves in an order so that ...
... connected across an a.c. supply. The variations with applied frequency f of the resistance R, the reactance XC of the capacitor, the reactance XL of the inductor and the impedance Z of the circuit are represented in the diagram. Which of the following sequences places the curves in an order so that ...
Proceedings - Edge - Rochester Institute of Technology
... reduces the range of the output voltage in order to provide an output range that would be acceptable to the comparators. Next, the comparators use the signal from the instrumentation amplifier and compare that voltage to a voltage set by a simple voltage divider network as show in Figure 6. ...
... reduces the range of the output voltage in order to provide an output range that would be acceptable to the comparators. Next, the comparators use the signal from the instrumentation amplifier and compare that voltage to a voltage set by a simple voltage divider network as show in Figure 6. ...
Fiber optic xmit/rcvr for 1 sec tick (
... format and pulse width distortion typically less than 25%. By setting R1 = 115 Ω, the transmitter can be driven with IF = 30 mA, if it is desired to economize on power or achieve lower pulse distortion. ...
... format and pulse width distortion typically less than 25%. By setting R1 = 115 Ω, the transmitter can be driven with IF = 30 mA, if it is desired to economize on power or achieve lower pulse distortion. ...
NOT FOR NEW DESIGNS
... The RF2367 is a low noise CDMA/TDMA/GSM PA driver amplifier with a very high dynamic range designed for transmit digital PCS applications with frequency ranges between 1700MHz and 2000MHz. The device functions as an outstanding PA driver amplifier in the transmit chain of digital subscriber units wh ...
... The RF2367 is a low noise CDMA/TDMA/GSM PA driver amplifier with a very high dynamic range designed for transmit digital PCS applications with frequency ranges between 1700MHz and 2000MHz. The device functions as an outstanding PA driver amplifier in the transmit chain of digital subscriber units wh ...
msm6100™ chipset solution
... Both the cellular and PCS output drive their own variable gain amplifier (VGA) with a gain control range of 85 dB. A final cellular driver amplifier provides a modulated RF output. To accommodate split band and filtering, the PCS VGA drives two output amplifiers that can be selected independently or ...
... Both the cellular and PCS output drive their own variable gain amplifier (VGA) with a gain control range of 85 dB. A final cellular driver amplifier provides a modulated RF output. To accommodate split band and filtering, the PCS VGA drives two output amplifiers that can be selected independently or ...
Motional feedback with loudspeakers
... employs velocity feedback, the voltage used as a measure of the velocity of the speech coil being the e.m.f. induced in the coil by its motion in the magnetic field [11. This voltage has of course to be separated from the voltage fed from the amplifier to the coil. Several methods are illustrated in ...
... employs velocity feedback, the voltage used as a measure of the velocity of the speech coil being the e.m.f. induced in the coil by its motion in the magnetic field [11. This voltage has of course to be separated from the voltage fed from the amplifier to the coil. Several methods are illustrated in ...
Appendix A Decibels
... attenuator gains are smaller than 1. Although the attenuator exhibits a loss, we can still refer to it as a gain as long as the gain ratio is smaller than 1. The gains in our examples have so far been simple numbers such as 5, or 10, or 0.5. In a real communications system, however, the gains might ...
... attenuator gains are smaller than 1. Although the attenuator exhibits a loss, we can still refer to it as a gain as long as the gain ratio is smaller than 1. The gains in our examples have so far been simple numbers such as 5, or 10, or 0.5. In a real communications system, however, the gains might ...
MAX2644 2.4GHz SiGe, High IP3 Low-Noise Amplifier General Description
... VCC Line Bypassing Bypassing the V CC line is necessary for optimum gain/linearity performance. A transmission line and two capacitors are required, as shown in the schematics in Figures 1 and 2. The optimum dimensions and positions of the components are as follows: the output transmission line dime ...
... VCC Line Bypassing Bypassing the V CC line is necessary for optimum gain/linearity performance. A transmission line and two capacitors are required, as shown in the schematics in Figures 1 and 2. The optimum dimensions and positions of the components are as follows: the output transmission line dime ...
RF3826 30MHz TO 2500MHz, 9W GaN WIDEBAND POWER AMPLIFIER Features
... The GaN HEMT device is a depletion mode high electron mobility transistor (HEMT). At zero volts VGS the drain of the device is saturated and uncontrolled drain current will destroy the transistor. The gate voltage must be taken to a potential lower than the source voltage to pinch off the device pri ...
... The GaN HEMT device is a depletion mode high electron mobility transistor (HEMT). At zero volts VGS the drain of the device is saturated and uncontrolled drain current will destroy the transistor. The gate voltage must be taken to a potential lower than the source voltage to pinch off the device pri ...
Overcurrent protection in Low Voltage Electrical Circuits
... economic reasons, circuit breakers that include electronic sensing means, except for rather special applications, are generally restricted to use with larger blocks of power. These circuit breakers are generally installed closer to the source of energy and for obvious reasons and come under the cont ...
... economic reasons, circuit breakers that include electronic sensing means, except for rather special applications, are generally restricted to use with larger blocks of power. These circuit breakers are generally installed closer to the source of energy and for obvious reasons and come under the cont ...
Sep 1992 Design Techniques for Electrostatic Discharge Protection
... Sean Gold leads off this issue with his article on techniques for staving off the horrors of ESD. Sean has been at LTC for four years, during which time he designed the LT1134, LT1137, LT1237, LT1330, LT1026 and the LT1116. He is an avid cyclist, urban adventurer, and alpine skier, and regularly att ...
... Sean Gold leads off this issue with his article on techniques for staving off the horrors of ESD. Sean has been at LTC for four years, during which time he designed the LT1134, LT1137, LT1237, LT1330, LT1026 and the LT1116. He is an avid cyclist, urban adventurer, and alpine skier, and regularly att ...
LMX2315/LMX2320/LMX2325 PLLatinum Frequency Synthesizer for RF Personal Communications LMX2325 2.5 GHz
... The analog switch is useful for radio systems that utilize a frequency scanning mode and a narrow band mode. The purpose of the analog switch is to decrease the loop filter time constant, allowing the VCO to adjust to its new frequency in a shorter amount of time. This is achieved by adding another ...
... The analog switch is useful for radio systems that utilize a frequency scanning mode and a narrow band mode. The purpose of the analog switch is to decrease the loop filter time constant, allowing the VCO to adjust to its new frequency in a shorter amount of time. This is achieved by adding another ...
PDF
... the TDC that is intended to be used in this PWM scheme (see Figure 2). After pulser linearity tests, a 10 !-Lei 22 N a source irradiated a 3 mm x 3 mm x 20 mm LYSO crystal connected to a single 3 mm x 3 mm solid state photomultipler (SSPM) pixel of the SENSL 4x4 SPMArray 3035G16. The test board cont ...
... the TDC that is intended to be used in this PWM scheme (see Figure 2). After pulser linearity tests, a 10 !-Lei 22 N a source irradiated a 3 mm x 3 mm x 20 mm LYSO crystal connected to a single 3 mm x 3 mm solid state photomultipler (SSPM) pixel of the SENSL 4x4 SPMArray 3035G16. The test board cont ...
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.