Wireless course Part 3 – Radio Antenna Theory v1
... An antenna system consists of the antenna, the feed-line, and any matching unit. Most antennas are made of copper or aluminum, while most mobile antennas are made of stainless steel. A feed-line consists of two conductors that carry the signal to and from the radio and to and from the antenna. A mat ...
... An antenna system consists of the antenna, the feed-line, and any matching unit. Most antennas are made of copper or aluminum, while most mobile antennas are made of stainless steel. A feed-line consists of two conductors that carry the signal to and from the radio and to and from the antenna. A mat ...
LF156 数据资料 dataSheet 下载
... forced to a high state. These amplifiers will operate with the common-mode input voltage equal to the positive supply. In fact, the common-mode voltage can exceed the positive supply by approximately 100 mV independent of supply voltage and over the full operating temperature range. The positive sup ...
... forced to a high state. These amplifiers will operate with the common-mode input voltage equal to the positive supply. In fact, the common-mode voltage can exceed the positive supply by approximately 100 mV independent of supply voltage and over the full operating temperature range. The positive sup ...
Extreme Dimming
... What’s all this talk of square pegs? The Light Emitting Diode (LED) – retrofit Lamp ...
... What’s all this talk of square pegs? The Light Emitting Diode (LED) – retrofit Lamp ...
Data Sheet
... provide isolated power up to 3W. The EV kit generates either ±15V, 100mA or ±12V, 50mA output voltages from a 17V to 32V input supply. The EV kit features a forcedPWM control scheme that provides constant switchingfrequency of 200kHz operation at all load and line conditions. The EV kit includes an ...
... provide isolated power up to 3W. The EV kit generates either ±15V, 100mA or ±12V, 50mA output voltages from a 17V to 32V input supply. The EV kit features a forcedPWM control scheme that provides constant switchingfrequency of 200kHz operation at all load and line conditions. The EV kit includes an ...
Design Application Note - AN-079 SGA-8543Z Amplifier Application Circuits
... All HBT amplifiers are subject to device current variation due to the decreasing nature of the internal VBE with increasing temperature. In the absence of an active bias circuit or resistive feedback, the decreasing VBE will result in increased base and collector currents. As the collector current c ...
... All HBT amplifiers are subject to device current variation due to the decreasing nature of the internal VBE with increasing temperature. In the absence of an active bias circuit or resistive feedback, the decreasing VBE will result in increased base and collector currents. As the collector current c ...
Document
... transfer of power into the device. Sampling the VIN_DC open circuit voltage is programmed using external resistors, and held with an external capacitor (CREF). The bq25504 was designed with the flexibility to support a variety of energy storage elements. The availability of the sources from which ...
... transfer of power into the device. Sampling the VIN_DC open circuit voltage is programmed using external resistors, and held with an external capacitor (CREF). The bq25504 was designed with the flexibility to support a variety of energy storage elements. The availability of the sources from which ...
C4205 - Baseops
... The current and overvoltage protection is automatically provided. Most DC distribution buses are connected to both generator buses, but have isolation diodes to prevent power crossfeed between the C4205 Based on MPTS Curriculum 2006 with Change 1 31 AUG 2006 ...
... The current and overvoltage protection is automatically provided. Most DC distribution buses are connected to both generator buses, but have isolation diodes to prevent power crossfeed between the C4205 Based on MPTS Curriculum 2006 with Change 1 31 AUG 2006 ...
BD9139MUV
... Since this IC functions with high efficiency without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. In case of extreme conditions, however, including lower input voltage, higher output voltage, heavier load, and/or ...
... Since this IC functions with high efficiency without significant heat generation in most applications, no special consideration is needed on permissible dissipation or heat generation. In case of extreme conditions, however, including lower input voltage, higher output voltage, heavier load, and/or ...
unit 2 dc machines
... Now, from the emf equation of dc generator, we know that Eg = kɸ. Hence, the generated emf should be directly proportional to field flux (and hence, also directly proportional to the field current). However, even when the field current is zero, some amount of emf is generated (represented by OA in t ...
... Now, from the emf equation of dc generator, we know that Eg = kɸ. Hence, the generated emf should be directly proportional to field flux (and hence, also directly proportional to the field current). However, even when the field current is zero, some amount of emf is generated (represented by OA in t ...
AD830: High Speed, Video Difference Amplifier Data Sheet (Rev B, 01/2003)
... The topology, reduced to its elemental form, is shown in Figure 7. Nonideal effects, such as nonlinearity, bias currents, and limited full scale, are omitted from this model for simplicity, but are discussed later. The key feature of this topology is the use of two, identical voltage-to-current conv ...
... The topology, reduced to its elemental form, is shown in Figure 7. Nonideal effects, such as nonlinearity, bias currents, and limited full scale, are omitted from this model for simplicity, but are discussed later. The key feature of this topology is the use of two, identical voltage-to-current conv ...
LM122 LM322 LM3905 Precision Timers
... Pin Function Description (Continued) present a minimum load on external signals tied to VADJ. This resistor is a pinched type with a typical variation in nominal value of b50%, a 100% and a TC of 0.7%/§ C. For this reason, external signals (typically a pot between VREF and ground) connected to VADJ ...
... Pin Function Description (Continued) present a minimum load on external signals tied to VADJ. This resistor is a pinched type with a typical variation in nominal value of b50%, a 100% and a TC of 0.7%/§ C. For this reason, external signals (typically a pot between VREF and ground) connected to VADJ ...
NAS3XXX SMT Non-Isolated Point-of
... 3). The ON/OFF pin should be in “Enabled” state when this function is effective. 4). The converter’s pre-bias startup is affected by this function. The converter will still be able to start under a pre-bias condition, but the output voltage waveform will have a glitch during startup. ...
... 3). The ON/OFF pin should be in “Enabled” state when this function is effective. 4). The converter’s pre-bias startup is affected by this function. The converter will still be able to start under a pre-bias condition, but the output voltage waveform will have a glitch during startup. ...
LM140K Series 3-Terminal Positive Regulators
... When the ground pin alone becomes disconnected, the output approaches the unregulated input, causing possible damage to other circuits connected to VOUT. If ground is reconnected with power “ON”, damage may also occur to the regulator. This fault is most likely to occur when plugging in regulators o ...
... When the ground pin alone becomes disconnected, the output approaches the unregulated input, causing possible damage to other circuits connected to VOUT. If ground is reconnected with power “ON”, damage may also occur to the regulator. This fault is most likely to occur when plugging in regulators o ...
ADP1877 英文数据手册DataSheet 下载
... The boost diodes are built into the ADP1877, thus lowering the overall system cost and component count. The ADP1877 can be set to operate in pulse skip high efficiency mode under light load or in PWM continuous conduction mode. ...
... The boost diodes are built into the ADP1877, thus lowering the overall system cost and component count. The ADP1877 can be set to operate in pulse skip high efficiency mode under light load or in PWM continuous conduction mode. ...
PAM2301 Description Pin Assignments
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
... Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: ...
AC Induction Motor Slip – What It Is And How To
... applications. A number of drive applications still exist, including printing machines, extruders, paper machines, cranes and elevators, in which high static speed accuracy, dynamic speed accuracy or both are required. ...
... applications. A number of drive applications still exist, including printing machines, extruders, paper machines, cranes and elevators, in which high static speed accuracy, dynamic speed accuracy or both are required. ...
BDTIC
... OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Sattelite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ o ...
... OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Sattelite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ o ...
emtron dx-4 - RADIOMANUAL
... dissipation of 2500W. The tubes are air cooled by a commercial grade forced air turbine blower system and two computer type fans sucking air and positioned above the tubes. All fans operate at two speeds, controlled by 2 temperature sensors. Tetrodes offer exceptionally stable operation and levels o ...
... dissipation of 2500W. The tubes are air cooled by a commercial grade forced air turbine blower system and two computer type fans sucking air and positioned above the tubes. All fans operate at two speeds, controlled by 2 temperature sensors. Tetrodes offer exceptionally stable operation and levels o ...
Alternating current
Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.AC is the form in which electric power is delivered to businesses and residences. The usual waveform of alternating current in most electric power circuits is a sine wave. In certain applications, different waveforms are used, such as triangular or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information encoded (or modulated) onto the AC signal, such as sound (audio) or images (video).