投影片 1
... Diversity Reception in Spread Spectrum • Spread spectrum modulation techniques are mostly employed in wireless communication systems. • In order to fully understand spread spectrum communications, we need to have a basic idea on the characteristics of wireless channels. • The behavior of a typical ...
... Diversity Reception in Spread Spectrum • Spread spectrum modulation techniques are mostly employed in wireless communication systems. • In order to fully understand spread spectrum communications, we need to have a basic idea on the characteristics of wireless channels. • The behavior of a typical ...
MOSFET Small Signal Model and Analysis •Just as we did
... go is internal to the transistor and can not be avoided. Any additional resistor due to external circuitry will lower the gain. For this reason current sources are often used as the “load” instead of bias resistors in amplifier circuits. ...
... go is internal to the transistor and can not be avoided. Any additional resistor due to external circuitry will lower the gain. For this reason current sources are often used as the “load” instead of bias resistors in amplifier circuits. ...
Microwave Oven Signal Interference And
... sweep time, Ts. The peak frequency deviation is determined by the modulation index, β. The carrier frequency of the AM-FM signal is a random variable Fc that is uniformly distributed between frequencies fa and fb. During any given period, Fc is fixed, but it varies from one ON cycle to the next. Usi ...
... sweep time, Ts. The peak frequency deviation is determined by the modulation index, β. The carrier frequency of the AM-FM signal is a random variable Fc that is uniformly distributed between frequencies fa and fb. During any given period, Fc is fixed, but it varies from one ON cycle to the next. Usi ...
Lecture_13_LP_RTL_95
... • Very often, the value transmitted on a bus (an address bus, for instance) is simply the previous value with an increment. Therefore, the lines can remain the same (i.e., no power consumption) as long as the codes are consecutive, which is mentioned to the receiver by an additional control signal. ...
... • Very often, the value transmitted on a bus (an address bus, for instance) is simply the previous value with an increment. Therefore, the lines can remain the same (i.e., no power consumption) as long as the codes are consecutive, which is mentioned to the receiver by an additional control signal. ...
ADuM2200 数据手册DataSheet下载
... The ADuM220x isolators provide two independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide). The ADuM220x models operate with the supply voltage of either side ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well ...
... The ADuM220x isolators provide two independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide). The ADuM220x models operate with the supply voltage of either side ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well ...
AN-804 Improving A/D Converter Performance Using Dither
... 2.0 SAMPLING AND QUANTIZATION Two processes which are inherent to the digital conversion of analog signals are sampling and quantization. It is important to review these processes and examine their effects on ADC noise. In analog sampling, a signal is ‘‘looked at’’ on only certain parts of its wavef ...
... 2.0 SAMPLING AND QUANTIZATION Two processes which are inherent to the digital conversion of analog signals are sampling and quantization. It is important to review these processes and examine their effects on ADC noise. In analog sampling, a signal is ‘‘looked at’’ on only certain parts of its wavef ...
Efficiency of Solid State Photomultipliers in Photon Number Resolution
... not so clear. Ultra-low excess noise factor Fm ~ 1.01 – 1.05 of Geiger mode avalanche limited by negative feedback (quenching) was observed in many reports for SSPM of different types. It was measured in correspondence with (5) applied in the most cases to single electron peak of charge / gain / pul ...
... not so clear. Ultra-low excess noise factor Fm ~ 1.01 – 1.05 of Geiger mode avalanche limited by negative feedback (quenching) was observed in many reports for SSPM of different types. It was measured in correspondence with (5) applied in the most cases to single electron peak of charge / gain / pul ...
Near-Field Probe Set - ETS
... Under Test (EUT) being tested. To do this an understanding of the nature of the time domain to frequency domain transform is necessary. ...
... Under Test (EUT) being tested. To do this an understanding of the nature of the time domain to frequency domain transform is necessary. ...
Chopper Stabilized Amplifiers - EECG Toronto
... In a less ideal situation, the amplifier would have a limited bandwidth, say up to twice the chopper frequency with a constant gain of A and is zero elsewhere (ideal low-pass). As shown in Fig. 3 [3], the amplifier output signal VA(t) is now a sinewave corresponding to the fundamental component of t ...
... In a less ideal situation, the amplifier would have a limited bandwidth, say up to twice the chopper frequency with a constant gain of A and is zero elsewhere (ideal low-pass). As shown in Fig. 3 [3], the amplifier output signal VA(t) is now a sinewave corresponding to the fundamental component of t ...
ADuM3200 数据手册DataSheet下载
... simple iCoupler digital interfaces and stable performance characteristics. The need for external drivers and other discrete components is eliminated with these iCoupler products. Furthermore, iCoupler devices consume one-tenth to one-sixth the power of optocouplers at comparable signal data rates. T ...
... simple iCoupler digital interfaces and stable performance characteristics. The need for external drivers and other discrete components is eliminated with these iCoupler products. Furthermore, iCoupler devices consume one-tenth to one-sixth the power of optocouplers at comparable signal data rates. T ...
Improving ADC Results Through Oversampling and
... Note that linear interpolation increases both the effective sample rate and the effective resolution of the samples by predicting the value of VIN for the times between real samples, but it can not recover any lost information. For example, Figure 8 on page 9 illustrates the loss of information abou ...
... Note that linear interpolation increases both the effective sample rate and the effective resolution of the samples by predicting the value of VIN for the times between real samples, but it can not recover any lost information. For example, Figure 8 on page 9 illustrates the loss of information abou ...
Crosstalk Circuit 2
... Two sets of clocks are used to feed the ten experiments. The clock frequency for the first five experiments and experiment 7 are driven from the first set. This clock is selected and enabled by populating one jumper on each of two header pin sets. The first set is labeled J54, and is shown in Figure ...
... Two sets of clocks are used to feed the ten experiments. The clock frequency for the first five experiments and experiment 7 are driven from the first set. This clock is selected and enabled by populating one jumper on each of two header pin sets. The first set is labeled J54, and is shown in Figure ...
BJT Amplifiers-Small Signal Operation
... Norton) where necessary. Ideally the base should be a single resistor + a single source. Do not confuse this with the DC Thevenin we did in step 1. ...
... Norton) where necessary. Ideally the base should be a single resistor + a single source. Do not confuse this with the DC Thevenin we did in step 1. ...
iC-MG 8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
... signal with an index pulse. The minimum phase distance can be preselected, to enhance the systems’s noise immunity and to allow for fail-safe counting. The PGA front-end permits differential (VDIFF or IDIFF mode) or single-ended input signals (VREF or IREF mode); high impedance (V modes) and low imp ...
... signal with an index pulse. The minimum phase distance can be preselected, to enhance the systems’s noise immunity and to allow for fail-safe counting. The PGA front-end permits differential (VDIFF or IDIFF mode) or single-ended input signals (VREF or IREF mode); high impedance (V modes) and low imp ...
Signal Corps (United States Army)
The United States Army Signal Corps develops, tests, provides, and manages communications and information systems support for the command and control of combined arms forces. It was established in 1860, the brainchild of United States Army Major Albert J. Myer, and has had an important role from the American Civil War through to the current day. Over its history, it had the initial responsibility for a number of functions and new technologies that are currently managed by other organizations, including military intelligence, weather forecasting, and aviation.