High-fidelity PWM inverter for digital audio amplification
... It is known that low-pass filter signal recovery is imperfect for PWM [1], [2]. In addition, it is natural to expect that the nonlinearities associated with real inverters and switching devices would tend to limit performance. With the extensive growth of digital audio, the digital characteristics o ...
... It is known that low-pass filter signal recovery is imperfect for PWM [1], [2]. In addition, it is natural to expect that the nonlinearities associated with real inverters and switching devices would tend to limit performance. With the extensive growth of digital audio, the digital characteristics o ...
Principles of Electronic Communication Systems
... There are two types of amplitude modulators. They ...
... There are two types of amplitude modulators. They ...
AD8345 数据手册DataSheet 下载
... I Channel Baseband Differential Input Pins. These high impedance inputs should be dc-biased to approximately 0.7 V. Nominal characterized ac swing is 0.6 V p-p on each pin (0.4 V to 1 V). This gives a differential drive of 1.2 V p-p. Inputs are not self-biasing, so external biasing circuitry must be ...
... I Channel Baseband Differential Input Pins. These high impedance inputs should be dc-biased to approximately 0.7 V. Nominal characterized ac swing is 0.6 V p-p on each pin (0.4 V to 1 V). This gives a differential drive of 1.2 V p-p. Inputs are not self-biasing, so external biasing circuitry must be ...
HMC1097LP4E 数据资料DataSheet下载
... The HMC1097LP4E is a low-noise, high-linearity, broadband Direct Quadrature Modulator designed for directly converting complex modulated baseband signals from zero IF or low IF to RF transmission levels from 100 MHz to 6 GHz. The HMC1097LP4E’s excellent noise and linearity performance makes it suita ...
... The HMC1097LP4E is a low-noise, high-linearity, broadband Direct Quadrature Modulator designed for directly converting complex modulated baseband signals from zero IF or low IF to RF transmission levels from 100 MHz to 6 GHz. The HMC1097LP4E’s excellent noise and linearity performance makes it suita ...
AD8345 140 MHz to 1000 MHz Quadrature Modulator Data Sheet
... Ground Pin for Input V-to-I Converters and Mixer Core. Ground Pin for the LO Phase Splitter and LO Buffers. Differential LO Drive Pins. Internal dc bias (approximately 1.8 V @ VS = 5 V) is supplied. Pins must be ac-coupled. Single-ended or differential drive is permissible. Power Supply Pin for the ...
... Ground Pin for Input V-to-I Converters and Mixer Core. Ground Pin for the LO Phase Splitter and LO Buffers. Differential LO Drive Pins. Internal dc bias (approximately 1.8 V @ VS = 5 V) is supplied. Pins must be ac-coupled. Single-ended or differential drive is permissible. Power Supply Pin for the ...
BI32385391
... pulses in a given time base, while keeping soft switching capability in the whole power range for which the converter was designed [1]. It is still possible to simultaneously control the PDM modulation ratio and the duty cycle allowing a finer and more accurate adjust of the output power delivered t ...
... pulses in a given time base, while keeping soft switching capability in the whole power range for which the converter was designed [1]. It is still possible to simultaneously control the PDM modulation ratio and the duty cycle allowing a finer and more accurate adjust of the output power delivered t ...
DCN-5-Data_Transmission
... – Half-Duplex » From lecturer to student and vice-versa but not at the same time. » If the lecturer wants discipline but not at the cost of liberty. – Full-Duplex » From lecturer to student and vice-versa at the same time. » If the lecturer does not believe in anything called discipline. ...
... – Half-Duplex » From lecturer to student and vice-versa but not at the same time. » If the lecturer wants discipline but not at the cost of liberty. – Full-Duplex » From lecturer to student and vice-versa at the same time. » If the lecturer does not believe in anything called discipline. ...
Respiration Rate Measurement Using
... ES1-1993 standard allows injecting up to 100 µA of current at 10 kHz. At lower frequencies, of course, the current that can be injected into the body is lower. For respiration, a high-frequency ac signal is injected into the body; this signal acts as a carrier that is amplitude-modulated by the low- ...
... ES1-1993 standard allows injecting up to 100 µA of current at 10 kHz. At lower frequencies, of course, the current that can be injected into the body is lower. For respiration, a high-frequency ac signal is injected into the body; this signal acts as a carrier that is amplitude-modulated by the low- ...
Receiver Dynamic Range: Part 1
... typical receiver is produced by the cascade of several different parts of the receiver. For example, the filtering is provided by the input (rf) filter, followed by a narrower first IF filter, and finally, a still narrower final IF filter. Because as signals pass through the receiver they are increa ...
... typical receiver is produced by the cascade of several different parts of the receiver. For example, the filtering is provided by the input (rf) filter, followed by a narrower first IF filter, and finally, a still narrower final IF filter. Because as signals pass through the receiver they are increa ...
SILTRONIX - 1011B User manual
... will soundlower than normal pitch to the other station. He will probably retune his dial to make you soun'dright. If you keep this up, you will gradually waltz one another acrossthe band. If both of you are mistuning to an unnatural higherpitch, you will waltz acrossthe band twice as fast. (And some ...
... will soundlower than normal pitch to the other station. He will probably retune his dial to make you soun'dright. If you keep this up, you will gradually waltz one another acrossthe band. If both of you are mistuning to an unnatural higherpitch, you will waltz acrossthe band twice as fast. (And some ...
Wireless Communications Research Overview
... Energy (transmit and processing) is the driving constraint Data flows to centralized location (joint compression) Low per-node rates but tens to thousands of nodes Intelligence is in the network rather than in the devices ...
... Energy (transmit and processing) is the driving constraint Data flows to centralized location (joint compression) Low per-node rates but tens to thousands of nodes Intelligence is in the network rather than in the devices ...
954-2875-2-SP - Gazi University Journal of Science
... extra clamping diodes or voltage balancing capacitors and it requires the reduced number of components to achieve the same number of output voltage levels among the conventional multilevel inverters [8]. Another important topic is the increasing the level number of multilevel inverter. Thus, the ha ...
... extra clamping diodes or voltage balancing capacitors and it requires the reduced number of components to achieve the same number of output voltage levels among the conventional multilevel inverters [8]. Another important topic is the increasing the level number of multilevel inverter. Thus, the ha ...
A Frequency Quadrupling Optical mm-Wave Generation
... 0, 1, 3, 4, 5, . . . , i = 2) represents the power of optical carrier (i = 0) or other undesired harmonics. Based on Eqs. (9) and (10), the bias offset (δ), the influence of modulation depth (Md ), the extinction ratio of sub-MZM (Er ) and non-ideal phase difference (δ1 ) on OSSR is investigated nu ...
... 0, 1, 3, 4, 5, . . . , i = 2) represents the power of optical carrier (i = 0) or other undesired harmonics. Based on Eqs. (9) and (10), the bias offset (δ), the influence of modulation depth (Md ), the extinction ratio of sub-MZM (Er ) and non-ideal phase difference (δ1 ) on OSSR is investigated nu ...
Coded Signals
... 5 Vpp chirp signal excitation at 30-70 MHz (left) and a 33 Vpp delta spike excitation (right). The coded excitation increased mean SNR (16±3) dB. www.helsinki.fi/yliopisto ...
... 5 Vpp chirp signal excitation at 30-70 MHz (left) and a 33 Vpp delta spike excitation (right). The coded excitation increased mean SNR (16±3) dB. www.helsinki.fi/yliopisto ...
Digital Communication System
... Such an impairment curve is not suitable for signals such as speech that have a very wide dynamic range (speech around 30dB). For instance, if S varies by 30dB this will not give satisfactory results. A flat impairment curve is needed. ...
... Such an impairment curve is not suitable for signals such as speech that have a very wide dynamic range (speech around 30dB). For instance, if S varies by 30dB this will not give satisfactory results. A flat impairment curve is needed. ...
Binary Phase Shift Keying (BPSK)
... four phases of the carrier is transmitted in a symbol duration denoted by Ts . Since one of four waveforms is transmitted there are two bits of information transmitted during each symbol duration. An alternative way of describing QPSK is that of two carriers offset in phase by 90 degrees. Each of th ...
... four phases of the carrier is transmitted in a symbol duration denoted by Ts . Since one of four waveforms is transmitted there are two bits of information transmitted during each symbol duration. An alternative way of describing QPSK is that of two carriers offset in phase by 90 degrees. Each of th ...
BDTIC www.BDTIC.com/infineon Wireless Control Remote Control Transmitter Keyfob
... PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum. COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™ of Epcos AG. FLEXGO™ of Microso ...
... PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum. COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™ of Epcos AG. FLEXGO™ of Microso ...
Interleaving and switching pattern modulation to conducted EMI
... Consider a system of N converters operating at the same switching period, Tc, on which a time delay of Tc/N is introduced among the switching patterns [8]. From the point of view of disturbance generation, it is equivalent to a single converter operated at frequency Nfc [9, 10]. Therefore, the outpu ...
... Consider a system of N converters operating at the same switching period, Tc, on which a time delay of Tc/N is introduced among the switching patterns [8]. From the point of view of disturbance generation, it is equivalent to a single converter operated at frequency Nfc [9, 10]. Therefore, the outpu ...
acknowledgment
... The different forms of electromagnetic radiation are defined by their frequencies and include radio waves, infrared radiation (heat), visible light, ultra violet light, X-rays and gamma rays. All these different frequencies of electromagnetic radiation form the electromagnetic spectrum. Electromagne ...
... The different forms of electromagnetic radiation are defined by their frequencies and include radio waves, infrared radiation (heat), visible light, ultra violet light, X-rays and gamma rays. All these different frequencies of electromagnetic radiation form the electromagnetic spectrum. Electromagne ...
Using Two-Point Modulation To Reduce Synthesizer Problems
... extends to DC. Most frequency synthesizers do not respond to this low-frequency signal because of their inherent high-pass filter characteristic when modulated at the VCO. The two-point modulation technique circumvents this problem by splitting the Gaussian filter signal, sending one portion to the ...
... extends to DC. Most frequency synthesizers do not respond to this low-frequency signal because of their inherent high-pass filter characteristic when modulated at the VCO. The two-point modulation technique circumvents this problem by splitting the Gaussian filter signal, sending one portion to the ...
Self- Coherent Optical OFDM, an Interesting Alternative to
... detection systems. At the receiver, however, the optical carrier is extracted from the signal with the use of filters with very narrow bandwidth and used as an LO using heterodyne or homodyne detection. The performance of such a system depends on the filter bandwidth that is used to extract the carr ...
... detection systems. At the receiver, however, the optical carrier is extracted from the signal with the use of filters with very narrow bandwidth and used as an LO using heterodyne or homodyne detection. The performance of such a system depends on the filter bandwidth that is used to extract the carr ...
Project 4 - Rensselaer Polytechnic Institute
... Project Packet • Final Data with Integrator (and possibly ...
... Project Packet • Final Data with Integrator (and possibly ...
Word - ITU
... tested at or very near to the maximum level of which the circuit is capable, in broadcasting practice, usually at the permitted maximum level (PML), i.e. 9 dBu0s. If the frequency of the test signal is more than one-third the band limiting frequency, e.g. if in a 15 kHz circuit the testing signal i ...
... tested at or very near to the maximum level of which the circuit is capable, in broadcasting practice, usually at the permitted maximum level (PML), i.e. 9 dBu0s. If the frequency of the test signal is more than one-third the band limiting frequency, e.g. if in a 15 kHz circuit the testing signal i ...
model 531 - Inovonics
... The Model 531 mounts in a standard 19-inch equipment rack and requires only 3½ inches (2U) of vertical rack space. Plastic finishing washers are recommended to protect the painted finish around the mounting holes. Consuming only one-half the power of a retro-replica Lava Lite®, the Model 531, itself ...
... The Model 531 mounts in a standard 19-inch equipment rack and requires only 3½ inches (2U) of vertical rack space. Plastic finishing washers are recommended to protect the painted finish around the mounting holes. Consuming only one-half the power of a retro-replica Lava Lite®, the Model 531, itself ...
Single-sideband modulation
In radio communications, Single-SideBand modulation (SSB) or Single-SideBand Suppressed-Carrier (SSB-SC) is a refinement of amplitude modulation which uses transmitter power and bandwidth more efficiently. Amplitude modulation produces an output signal that has twice the bandwidth of the original baseband signal. Single-sideband modulation avoids this bandwidth doubling, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver.