MML4402-GM3数据手册分立半导体产品的二极管-射频规格书PDF

描述 Description

There are two principle applications for which the MML4400 series are intended:1) MRI receiver protection from high RF energy fields, including long RF pulses and RF spike pulses present in most MRI machines. The MML4400 series acts as a passive protector (limiter) for the MRI receiver’s LNA. The diode assembly exhibits extremely low insertion loss, both in the “on” state (high power present) and the “off” state (receiver power present) so the Receiver’s Noise Figure is not increased by the protector circuit.2) Passive switching of surface coil detuning and blocking circuits. In this case, the flow of loop current during transmitter pulse turns on the diodes, without a switch driver.The MML4400 series can be combined with a PIN diode (UM7201SM) and the combination can be used to implement a semi-active detune or block circuit design. The MML4400’s turn on the PIN diode (used for higher power switching) during the sinc(x) sidelobes, before the main pulse of the transmitter waveform, sinc(x) = [sin (x)]/x, occurs.This surface mount limiter meets RoHS requirements per EU Directive 2011/65/EC and 2002/95 EC.

简介

MML4402-GM3属于分立半导体产品的二极管-射频。由制造生产的MML4402-GM3二极管 - 射频射频二极管是一种双端子半导体器件，只允许一个方向通过电流，而限制反方向的电流。该系列器件用于射频匹配电路以进行电子调谐。二极管类型包括 PIN 型、肖特基型和标准型，反向电压范围为 1 至 15,000 V，电流范围为 10 mA 至 20A。