Some Thoughts on Regenerative Receivers
... regenerative detector is its own little QRP transmitter! For domestic and neighborhood tranquility, the isolation amplifier greatly reduces radiation back into the antenna. It is not perfect, and my two commercial kit regenerative receivers make an impromptu signal generator in the ham shack when ne ...
... regenerative detector is its own little QRP transmitter! For domestic and neighborhood tranquility, the isolation amplifier greatly reduces radiation back into the antenna. It is not perfect, and my two commercial kit regenerative receivers make an impromptu signal generator in the ham shack when ne ...
TS30011/12/13
... regulator is ideal for use in the commercial, industrial, and automotive market segments. It includes flexibility to be used for a wide range of output voltages and is optimized for high efficiency power conversion with low RDSON integrated synchronous switches. A 1MHz internal switching frequency f ...
... regulator is ideal for use in the commercial, industrial, and automotive market segments. It includes flexibility to be used for a wide range of output voltages and is optimized for high efficiency power conversion with low RDSON integrated synchronous switches. A 1MHz internal switching frequency f ...
AND8255/DA Simple DC SPICE Model for the LLC
... frequency for given input and output conditions. The output capacitor has been kept in place, but does not play any role in DC. The right side OPAMP just helps to close the loop in DC and have the right operating point automatically setup, e.g. 24 V at a given output power level. In this example, th ...
... frequency for given input and output conditions. The output capacitor has been kept in place, but does not play any role in DC. The right side OPAMP just helps to close the loop in DC and have the right operating point automatically setup, e.g. 24 V at a given output power level. In this example, th ...
Variable- Voltage Techniques
... Voltage scheduling for real-time applications is complex for several reasons: A real-time application consists of two or more tasks. In certain applications, precedence relations exist among tasks A variable-voltage processor uses only a few discrete voltages (or frequencies) because preparing a lot ...
... Voltage scheduling for real-time applications is complex for several reasons: A real-time application consists of two or more tasks. In certain applications, precedence relations exist among tasks A variable-voltage processor uses only a few discrete voltages (or frequencies) because preparing a lot ...
UCC25230 - Texas Instruments
... specified in JESD51-7, in an environment described in JESD51-2a. The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88. The junction-to ...
... specified in JESD51-7, in an environment described in JESD51-2a. The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDECstandard test exists, but a close description can be found in the ANSI SEMI standard G30-88. The junction-to ...
Data Sheet Features General Description
... series resistance (ESR) that is required to minimize output voltage ripple and load step transients, as well as the amount of bulk capacitor that is necessary to ensure the control loop is stable. Loop stability can be also checked by viewing the load step transient response as described in a latter ...
... series resistance (ESR) that is required to minimize output voltage ripple and load step transients, as well as the amount of bulk capacitor that is necessary to ensure the control loop is stable. Loop stability can be also checked by viewing the load step transient response as described in a latter ...
AMS2942 数据手册DataSheet 下载
... capacitor the part will oscillate. Most types of tantalum or aluminum electrolytic works fine here; even film types work but are not recommended for reasons of cost. Many aluminum types have electrolytes that freeze at about -30°C, so solid tantalums are recommended for operation below -25°C. The im ...
... capacitor the part will oscillate. Most types of tantalum or aluminum electrolytic works fine here; even film types work but are not recommended for reasons of cost. Many aluminum types have electrolytes that freeze at about -30°C, so solid tantalums are recommended for operation below -25°C. The im ...
Snubber Circuit for Buck Converter IC : Power Management
... properties (Figure 3). RC snubber circuits are commonly employed to eliminate such high-frequency noise. The reduction of high-frequency noise can be achieved by adding a simple RC network to the switch node, as shown in Figure 4. Figure 5 shows the operation of the snubber circuit. The energy that ...
... properties (Figure 3). RC snubber circuits are commonly employed to eliminate such high-frequency noise. The reduction of high-frequency noise can be achieved by adding a simple RC network to the switch node, as shown in Figure 4. Figure 5 shows the operation of the snubber circuit. The energy that ...
Capacitor Circuit Investigation Name Hour ______ Purpose: Use
... The two capacitors always have the same voltage drop/ the two capacitors always have different voltages/ the two capacitors sometimes have different voltages 10. Check the value of the battery’s voltage by right clicking on it. How does the voltage drop across each capacitor compare to the voltage a ...
... The two capacitors always have the same voltage drop/ the two capacitors always have different voltages/ the two capacitors sometimes have different voltages 10. Check the value of the battery’s voltage by right clicking on it. How does the voltage drop across each capacitor compare to the voltage a ...
Low Voltage and Medium Voltage Variable Frequency Drives
... compressors applications. The CSI – PWM drive, see Figure 6, consists of rectifier circuit utilizing SCRs in to convert 60 Hz input supply to variable DC supply, large reactor in the DC link and PWM inverter using GTOs coupled to an output capacitor for high order harmonic reduction. PWM inverter us ...
... compressors applications. The CSI – PWM drive, see Figure 6, consists of rectifier circuit utilizing SCRs in to convert 60 Hz input supply to variable DC supply, large reactor in the DC link and PWM inverter using GTOs coupled to an output capacitor for high order harmonic reduction. PWM inverter us ...
View/Download-PDF - International Journal of Computer Science
... generation and UPS. Thus inverter with high voltage boost with high efficiency is of great demand. The traditional inverter topologies include voltage and current fed inverters. In voltage fed inverter topology a capacitor is kept in parallel with the dc source in this effective buck operation can b ...
... generation and UPS. Thus inverter with high voltage boost with high efficiency is of great demand. The traditional inverter topologies include voltage and current fed inverters. In voltage fed inverter topology a capacitor is kept in parallel with the dc source in this effective buck operation can b ...
frequency and phase modulation
... • Advantages of FM using Varactor Diode – • 1. High frequency stability as crystal oscillator is isolated from modulator. • Disadvantages – • 1. To avoid distortion, the amplitude of modulating signal is to be kept small. • 2. The varactor diode must have non linear characteristics of capacitance v ...
... • Advantages of FM using Varactor Diode – • 1. High frequency stability as crystal oscillator is isolated from modulator. • Disadvantages – • 1. To avoid distortion, the amplitude of modulating signal is to be kept small. • 2. The varactor diode must have non linear characteristics of capacitance v ...
lab sheet - Faculty of Engineering
... a decrease in voltage across the anode and the cathode as verified by Ohm's law where V = IR. When R is small, so is the voltage drop across it. The forward current flowing through the SCR is limited primarily by the impedance of the external circuit, and the SCR will remain on as long as this curre ...
... a decrease in voltage across the anode and the cathode as verified by Ohm's law where V = IR. When R is small, so is the voltage drop across it. The forward current flowing through the SCR is limited primarily by the impedance of the external circuit, and the SCR will remain on as long as this curre ...
MAX17067 Low-Noise Step-Up DC-DC Converter General Description Features
... The MAX17067 boost converter incorporates highperformance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.15Ω n-channel MOSFET to provide a highly efficient regulator with fast response. High switching frequency (640kHz or 1.2MHz selectable) allow ...
... The MAX17067 boost converter incorporates highperformance (at 1.2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.15Ω n-channel MOSFET to provide a highly efficient regulator with fast response. High switching frequency (640kHz or 1.2MHz selectable) allow ...
No-Nonsense Study Guides
... sub-bands in the 80m, 40m, 15m, and 10m bands, as well as phone in the 10m band. The General Class license is the next step. When you pass the General Class license test, sometimes referred to as Element 3, you can operate phone and digital modes in parts of all the HF bands. The test is another 35- ...
... sub-bands in the 80m, 40m, 15m, and 10m bands, as well as phone in the 10m band. The General Class license is the next step. When you pass the General Class license test, sometimes referred to as Element 3, you can operate phone and digital modes in parts of all the HF bands. The test is another 35- ...
10kV SiC-based Isolated DC-DC Converter for Medium Voltage
... are shown in Fig. 3-b). As the transformer’s turns ratio matches the ratio between the voltages applied from the MV side and LV side power electronic bridges, the current shows an almost rectangular shape, featuring a low RMS value. Furthermore, it can be seen that all semiconductors switch under ze ...
... are shown in Fig. 3-b). As the transformer’s turns ratio matches the ratio between the voltages applied from the MV side and LV side power electronic bridges, the current shows an almost rectangular shape, featuring a low RMS value. Furthermore, it can be seen that all semiconductors switch under ze ...
RF5745 2.4GHz TO 2.5GHz, 802.11b/g/n SINGLE-BAND FRONT END MODULE Features
... The RF5745 is an integrated front-end module (FEM) for high performance ZigBee® (802.15.4) and WiFi (802.11b/g) applications in the 2.4GHz to 2.5GHz ISM band. The FEM addresses the need for aggressive size reduction by integrating 50 matching networks to all RF ports and minimizing the number of ex ...
... The RF5745 is an integrated front-end module (FEM) for high performance ZigBee® (802.15.4) and WiFi (802.11b/g) applications in the 2.4GHz to 2.5GHz ISM band. The FEM addresses the need for aggressive size reduction by integrating 50 matching networks to all RF ports and minimizing the number of ex ...
lab sheet - Faculty of Engineering
... in voltage across the anode and the cathode as verified by Ohm's law where V = IR. When R is small, so is the voltage drop across it. The forward current flowing through the SCR is limited primarily by the impedance of the external circuit, and the SCR will remain on as long as this current does not ...
... in voltage across the anode and the cathode as verified by Ohm's law where V = IR. When R is small, so is the voltage drop across it. The forward current flowing through the SCR is limited primarily by the impedance of the external circuit, and the SCR will remain on as long as this current does not ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""