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A frequency-to-voltage converter (FVC) is designed for directly converting an input radio-frequency to a dc output voltage over a wide microwave frequency range. The proposed circuit consists of a limiting amplifier (LA) for converting input frequency to correspond ac magnitude and a power detector for ac magnitude to dc voltage conversion. Consequently, the circuit converts the signal frequency of...
In this study, four different types of power detectors are implemented in 0.18 µm CMOS technology for the THz image sensor application. These power detectors include common-source with and without supply voltage, and common-gate with and without supply voltage. The measured responsivities at 332 GHz are 632 kV/W, 13.2 kV/W, 16.2 kV/W, and 9.1 kV/W, respectively. The image resolution of the proposed...
A broadband frequency-to-voltage converter is designed to operate at the multi-GHz frequency band. The circuit detects the input signal frequency and generates a DC output voltage correspondingly, regardless of the input power variation through a two-path signal process of frequency discrimination and signal power reference. One advantage of the design utilizing power detection makes the method feasible...
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