to handphone burglar alarm using pic 16f877a
... resistance, usually between 1K and 5K ohms when inactive and double the value when active. This wiring system is called dual loop and allows for both alarm and anti-tamper detections to be incorporated into one circuit (anti-tamper occurs when the resistance level moves outside normal open/close val ...
... resistance, usually between 1K and 5K ohms when inactive and double the value when active. This wiring system is called dual loop and allows for both alarm and anti-tamper detections to be incorporated into one circuit (anti-tamper occurs when the resistance level moves outside normal open/close val ...
Radio Receivers, from crystal set to stereo
... program for "broad audience") are placed in the waveband from 88 MHz til 108 MHz, the maximum frequency shift of the transmitter (during the modulation) being ±75 kHz. Because of that the FM signal should be drawn much "thicker", but it would result in a black-square-shaped picture. ...
... program for "broad audience") are placed in the waveband from 88 MHz til 108 MHz, the maximum frequency shift of the transmitter (during the modulation) being ±75 kHz. Because of that the FM signal should be drawn much "thicker", but it would result in a black-square-shaped picture. ...
Backplane Transceiver TechnologiesBackplane Designer`s Guide
... switching under perfect backplane conditions, but backplane conditions are rarely ideal. In many situations, where the number of loads is significant, an ABT device must rely on a reflected wave to signal the receivers in the backplane. Since the receivers have to wait for the reflected wave to be s ...
... switching under perfect backplane conditions, but backplane conditions are rarely ideal. In many situations, where the number of loads is significant, an ABT device must rely on a reflected wave to signal the receivers in the backplane. Since the receivers have to wait for the reflected wave to be s ...
An efficient approach to noise analysis through multidimensional
... sources in terms of carrier velocity and population fluctuations—called diffusion and generation-recombination noise sources, respectively. Second, they evaluate the effect of microscopic fluctuations on voltage or current fluctuations at the device terminals. Owing to the small amplitude of microsc ...
... sources in terms of carrier velocity and population fluctuations—called diffusion and generation-recombination noise sources, respectively. Second, they evaluate the effect of microscopic fluctuations on voltage or current fluctuations at the device terminals. Owing to the small amplitude of microsc ...
Cyclostationary Noise - The Designer`s Guide Community
... Stationary noise contains equal AM & PM components With compression or saturation – Carrier causes gain to be periodically modulated – Modulation acts to suppress AM component of noise – Leaving PM component ...
... Stationary noise contains equal AM & PM components With compression or saturation – Carrier causes gain to be periodically modulated – Modulation acts to suppress AM component of noise – Leaving PM component ...
Differential Impedance Measurement with Time Domain Reflectometry
... line. The narrowest line has more fringe fields in air, contributing to a lower effective dielectric constant and hence shorter roundtrip time delay. The widest line has the lowest impedance and least amount of field lines in air, resulting in higher effective dielectric constant and longest ...
... line. The narrowest line has more fringe fields in air, contributing to a lower effective dielectric constant and hence shorter roundtrip time delay. The widest line has the lowest impedance and least amount of field lines in air, resulting in higher effective dielectric constant and longest ...
Mohr on Receiver Noise Characterization, Insights & Surprises
... Optimum Source Impedance for Minimum Noise Figure ...
... Optimum Source Impedance for Minimum Noise Figure ...
AD7452 数据手册DataSheet下载
... The part contains a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. ...
... The part contains a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. ...
1-Electronic signal Processing
... The 1/f noise contribution to ENC is only proportional to input capacitance. It does not depend on shaping time, transconductance or parallel resistance. It is usually quite low (a few 10th of electrons) and has to be considered only when looking to very low noise detectors and electronics (hence a ...
... The 1/f noise contribution to ENC is only proportional to input capacitance. It does not depend on shaping time, transconductance or parallel resistance. It is usually quite low (a few 10th of electrons) and has to be considered only when looking to very low noise detectors and electronics (hence a ...
Microcontroller Based Numerical Mho Distance Relay
... occurrence of faults in three protective zones of mho Distance relay. A slave relay whose contacts are connected in series with the trip circuit of circuit breaker is used to actuate the trip circuit after receiving the trip signal output by the microprocessor through an I/O port line on occurrence ...
... occurrence of faults in three protective zones of mho Distance relay. A slave relay whose contacts are connected in series with the trip circuit of circuit breaker is used to actuate the trip circuit after receiving the trip signal output by the microprocessor through an I/O port line on occurrence ...
SUBSTRATE NOISE COUPLING IN RFICS
... circuit design and validation phases. This will allow designers to optimize the design, maximize noise isolation and protect sensitive analog/RF blocks from being degraded by substrate noise coupling. Several effects of substrate coupling on circuit performance will be identified and remedies will b ...
... circuit design and validation phases. This will allow designers to optimize the design, maximize noise isolation and protect sensitive analog/RF blocks from being degraded by substrate noise coupling. Several effects of substrate coupling on circuit performance will be identified and remedies will b ...
Latency - (SCTE) - New Jersey Chapter
... Troubleshooting any DOCSIS network begins with a BOTTOM UP approach. Today, typically 80% of the problems are RF and 20% are IP/DOCSIS related. ...
... Troubleshooting any DOCSIS network begins with a BOTTOM UP approach. Today, typically 80% of the problems are RF and 20% are IP/DOCSIS related. ...
Principles of Communication Systems, Third Edition
... PROPRIETARY MATERIAL. © 2008 The McGraw-Hill Companies, Inc. All rights reserved. No part of this PowerPoint slide may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limited distribution to teachers and e ...
... PROPRIETARY MATERIAL. © 2008 The McGraw-Hill Companies, Inc. All rights reserved. No part of this PowerPoint slide may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limited distribution to teachers and e ...
ADS5413 数据资料 dataSheet 下载
... The ADS5413 is a 12-bit pipeline ADC. Its low power (400 mW) at 65 MSPS and high sampling rate is achieved using a state-of-the-art switched capacitor pipeline architecture built on an advanced low-voltage CMOS process. The ADS5413 analog core operates from a 3.3 V supply consuming most of the power ...
... The ADS5413 is a 12-bit pipeline ADC. Its low power (400 mW) at 65 MSPS and high sampling rate is achieved using a state-of-the-art switched capacitor pipeline architecture built on an advanced low-voltage CMOS process. The ADS5413 analog core operates from a 3.3 V supply consuming most of the power ...
A CMOS nested-chopper instrumentation amplifier with 100
... source, it may change due to aging and temperature variations. This implies that it has a certain bandwidth and can therefore be considered as a very low-frequency noise source. B. Classification Due to historical reasons, some confusion has arisen in the naming conventions of the different dynamic ...
... source, it may change due to aging and temperature variations. This implies that it has a certain bandwidth and can therefore be considered as a very low-frequency noise source. B. Classification Due to historical reasons, some confusion has arisen in the naming conventions of the different dynamic ...
MAX1437B Octal, 12-Bit, 50Msps, 1.8V ADC with Serial LVDS Outputs General Description
... fully differential signal path. This ADC is optimized for low-power and high-dynamic performance in medical imaging instrumentation and digital communications applications. The MAX1437B operates from a 1.8V single supply and consumes only 768mW (96mW per channel) while delivering a 70.2dB (typ) sign ...
... fully differential signal path. This ADC is optimized for low-power and high-dynamic performance in medical imaging instrumentation and digital communications applications. The MAX1437B operates from a 1.8V single supply and consumes only 768mW (96mW per channel) while delivering a 70.2dB (typ) sign ...
Foundation Fieldbus
... FFB technology was successfully demonstrated at the International Specialty Products facility in Lima, Ohio, in May 2005. The demonstration consisted of converting one of the three filter beds in the process from control in the host to field-based control, using linking devices containing FFBs from ...
... FFB technology was successfully demonstrated at the International Specialty Products facility in Lima, Ohio, in May 2005. The demonstration consisted of converting one of the three filter beds in the process from control in the host to field-based control, using linking devices containing FFBs from ...
Chapter 7 - SaigonTech
... • Baseband systems use a digital encoding scheme at a single fixed frequency • Broadband systems use analog techniques to encode information across a continuous range of values – Signals move across the medium in the form of continuous electromagnetic or optical waves – Data flows one way only, so t ...
... • Baseband systems use a digital encoding scheme at a single fixed frequency • Broadband systems use analog techniques to encode information across a continuous range of values – Signals move across the medium in the form of continuous electromagnetic or optical waves – Data flows one way only, so t ...
www.ijecs.in International Journal Of Engineering And Computer Science ISSN:2319-7242
... According to the IEEE 802.11a standard among the 64 subcarriers- the first 6 sub-carriers, the last 5 sub-carriers and the sub-carrier at position „33‟ should all be null carriers. Apart from the null sub-carriers the remaining sub-carriers contain modulated data before introducing it to inputs of I ...
... According to the IEEE 802.11a standard among the 64 subcarriers- the first 6 sub-carriers, the last 5 sub-carriers and the sub-carrier at position „33‟ should all be null carriers. Apart from the null sub-carriers the remaining sub-carriers contain modulated data before introducing it to inputs of I ...
Xenus PLUS 2-Axis EtherCAT XE2
... (SER-CK) contains a modular cable, and an adapter that connects to a 9-pin, Sub-D serial port connector (COM1, COM2, etc.) on PC’s and compatibles. After power-on or a reset, the Baud rate will be 9,600. After connecting at that rate, the Baud rate can be programmed to a 115,200 (max) and will remai ...
... (SER-CK) contains a modular cable, and an adapter that connects to a 9-pin, Sub-D serial port connector (COM1, COM2, etc.) on PC’s and compatibles. After power-on or a reset, the Baud rate will be 9,600. After connecting at that rate, the Baud rate can be programmed to a 115,200 (max) and will remai ...
Telecommunication
Telecommunication occurs when the exchange of information between two or more entities (communication) includes the use of technology. Communication technology uses channels to transmit information (as electrical signals), either over a physical medium (such as signal cables), or in the form of electromagnetic waves. The word is often used in its plural form, telecommunications, because it involves many different technologies.Early means of communicating over a distance included visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs. Other examples of pre-modern long-distance communication included audio messages such as coded drumbeats, lung-blown horns, and loud whistles. Modern technologies for long-distance communication usually involve electrical and electromagnetic technologies, such as telegraph, telephone, and teleprinter, networks, radio, microwave transmission, fiber optics, and communications satellites.A revolution in wireless communication began in the first decade of the 20th century with the pioneering developments in radio communications by Guglielmo Marconi, who won the Nobel Prize in Physics in 1909. Other highly notable pioneering inventors and developers in the field of electrical and electronic telecommunications include Charles Wheatstone and Samuel Morse (telegraph), Alexander Graham Bell (telephone), Edwin Armstrong, and Lee de Forest (radio), as well as John Logie Baird and Philo Farnsworth (television).