Size: 172 x 230 mm
Publisher: 17 Estudios Críticos
Text: Copper / Silkscreen
Components: SMD-405
Front and back covers: Double layer black matt 2 mm PCB


› ICs

› LTC5534
LT5534 Chip from Linear Technology The LT®5534 is a 50MHz to 3GHz monolithic RF powerdetector capable of measuring RF signals over a 60dB dynamic range. The RF signal in a decibel scale is precisely converted into DC voltage on a linear scale. The60dB input dynamic range is achieved using cascaded RFdetectors and RF limiters. Their outputs are summed to generate an accurate log-linear DC voltage proportional to the input RF signal in dB. The output is buffered with a low output impedance driver. The LT5534 delivers superior temperature stability (typical output variation within ±1dB over the full temperature range). The output responds in less than 40ns to a large RF input signal ADD a Meter

› AD8313/14/17/18/19
AD8317/18/19 y evaluation boards AD8317

› LMH2110
LMH2110 50MHz-8GHz Acting as LOG Amp Detectors LOG Amp detectors are widely used RF power detectors for GSM and the early W-CDMA systems. The transfer function of a LOG amp detector has a linear-in-dB response, which means that the output in volts changes linearly with the RF power in dBm. This is convenient since most communication standards specify transmit power levels in dBm as well. LOG amp detectors implement the logarithmic function by a piecewise linear approximation. Consequently, the LOG amp detector does not implement an exact power measurement, which implies a dependency on the signal shape. In systems using various modulation schemes calibration and lookup tables might be required.
Acting as RMS detectors
An RMS detector has a response that is insensitive to the signal shape and modulation form. This is because its operation is based on exact determination of the average power, ...
RMS detectors are in particular suited for the newer communication standards like W-CDMA and LTE that exhibit large peak-to-average ratios and different modulation schemes (signal shapes). This is a key advantage compared to other types of detectors in applications that employ signals with high peak-to-average power variations or different modulation schemes. For example, the RMS detector response to a 0 dBm modulated W- CDMA signal and a 0 dBm unmodulated carrier is essentially equal. This eliminates the need for long calibration procedures and large calibration tables in the baseband due to different applied modulation schemes.




2.4 GHz = 12.5 cm / Bluetooth, WLAN
1800MHz = 16 cm / E Netz GSM
900MHz = 33 cm / D Netz GSM
500 MHz = 60 cm / DVBT K24 Television
100 MHz = 150 cm / FM Broadcast

› SD
/Logger Shield Datalogging



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