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a). Receiver block diagram b). Current implementation of the receiver non-linear network inverse function.
Source publication
The dynamic range of a signal at the input of a measurement system during a short circuit test is increased several times by the nominal input voltage. Saturation of the measurement system may occur in a device under failure test. This paper introduces the application of a nonlinear compensation to limit the voltage range at the input of a voltage...
Context in source publication
Context 1
... with the transmitter equipment, the receiver also has both analog and digital sections. Figure 3 shows a simplified block diagram of one receiver. The analog section is in charge of detecting, amplifying and demodulating the incoming PFM signal from the transmitter module, the demodulated signal is introduced to the inverse nonlinear function network to recover the original signal from the transmitter. ...
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Citations
... These generated frequency spurious decrease the SFDR and increase the total harmonic distortions (THD) that diminish the ADC bit resolution [9,10,11,12]. Likewise, the time mismatch between the demultiplexed channels, due to nonlinear electrooptical components, creates bottlenecks that limit the sampling rate [13,14,15]. ...
In this paper we present the practical implementation of a high-speed polyphase sampling and demultiplexing architecture for optoelectronics analog-to-digital converters (OADCs). The architecture consists of a one-stage divide-by-eight decimator circuit where optically-triggered samplers are cascaded to sample an analog input signal, and demultiplex different phases of the sampled signal to yield low data rate for electronic quantization. Electrical-in to electrical-out data format is maintained through the sampling, demultiplexing and quantization processes of the architecture thereby avoiding the need for electrical-to-optical and optical-to-electrical signal conversions. We experimentally demonstrate a 10.24 giga samples per second (GS/s), 12-bit resolution OADC system comprising the optically-triggered sampling circuits integrated with commercial electronic quantizers. Measurements performed on the OADC yielded an effective bit resolution (ENOB) of 10.3 bits, spurious free dynamic range (SFDR) of -32 dB and signal-to-noise and distortion ratio (SNDR) of 63.7 dB.
... Testing laboratories of High-Current and Low-Voltage (HCLV) require the measure of large currents and voltages, in the order of tens of kilo amps and kilo volts. Special caution has to be applied to ensure complete electrical isolation before acquiring voltage signals and transmitting data to the control room for later processing [1]. However, the main problem is to preserve the integrity of signals which have to be transmitted without any distortion [2]. ...
Measuring systems based on a pair of optical fiber transmitterreceivers are used in mediumvoltage testing laboratories wherein the environment of high electromagnetic interference (EMI) is a limitation for using conventional cabling. Nonlinear compensation techniques have been used to limit the voltage range at the input of optical fiber links. However, nonlinear compensation introduces gain and linearity errors caused by thermal drift. This paper presents a method of thermal compensation for the nonlinear circuit used to improve transient signal handling capabilities in measuring system while maintaining low errors in gain and linearity caused by thermal drift.
