摘要:
A gated RF preamplifier used in system for performing pulsed RF FT EPR spectroscopy and imaging or MRI. The RF preamplifier does not overload during a transmit cycle so that recovery is very fast to provide for ultra-fast data acquisition in an ultra-fast excitation subsystem. The preamplifier includes multiple low-gain amplification stages with high-speed RF gates inserted between stages that are switched off to prevent each stage from overloading during the transmit cycle.
摘要翻译:用于执行脉冲RF FT EPR光谱和成像或MRI的系统中的门控RF前置放大器。 射频前置放大器在发射周期内不会过载,因此恢复非常快,以提供超快速激励子系统中的超快数据采集。 前置放大器包括多个低增益放大级,其中高速RF门插入在被切断的级之间,以防止每一级在发送周期期间发生过载。