3 results about "Hybrid amplifier" patented technology

Embodiments of the present disclosure comprise an optical amplifier system, with the system comprising an erbium-doped fiber amplifier comprising a C band EDFA configured to generate C band light, and an L band EDFA configured to generate L Band light. A Raman amplifier comprising a fiber span may be pumped using a backward pump light.

A radar system includes a hybrid power amplifier and a power control unit coupled to the hybrid power amplifier. The power control unit is configured to control the amplification of a chirped signal output by the radar system based on an evaluation of the chirp interval time provided by a chirp characteristic curve. The chirp interval time is the time difference between a first chirped signal and a second chirped signal to be output by the hybrid power amplifier. When the power control unit determines that the chirp interval time is less than a chirp interval time threshold, a fast power loop control configuration is used to control the output power transmitted at the hybrid amplifier stage. When the power control unit determines that the chirp interval time is equal to or greater than the chirp interval time threshold, a slow power loop configuration or a combination of a slow loop configuration and a fast loop configuration is used to control the output power transmitted at the hybrid power amplifier. A lookup table generated by the power control unit in the controller is used to determine the control signals and values ​​to be amplified by the hybrid power amplifier and voltage regulator for the chirped signal.

A hybrid amplifier includes: a first to fourth PWM circuit, comparing triangular wave signals and filter signals to generate PWM signals; a first processing circuit, generating pulse-width processed signals based on the PWM signals and the polarity of input signals; a judgment circuit, generating a selection signal based on the level of a differential input signal; a selection circuit, generating switching control signals according to the selection signal and the pulse-width processed signals; and a first and second power stage generating switching voltages based on the switching control signals to switch an inductor to generate output signals. When outside the light-load range, the first switching signal controls the switching voltage to toggle between a higher voltage level and ground, while the second switching signal approximates the fundamental frequency. When within the light-load range, the switching control signals control the switching voltage to toggle between a lower voltage level and ground.