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The sending and receiving circuit is designed in this paper for ground-based coherent high-frequency radar. The system has some functions such as antenna aperture standing wave detection, final-stage power amplifier temperature detection and detection of various power source voltages and currents; it is capable of outputting large standing-wave ratio protection and sending and receiving time sequence...
A soft-start circuit for automobile voltage regulator is presented in this paper. By using a DAC control and frequency detection technology, this circuit can provide a 17% pre-excitation duty ratio to start the automobile voltage regulator. When the alternator achieves the cut-in rotational speed, the soft start circuit increases the duty ratio of the driving pulse for the switching transistor from...
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