通常一个五极管放大器最大增益不过250倍左右,但这种所谓“饿电流”放大器,可使一个普通五极放大器的增益提高到1000倍左右,而且噪声还能降低. 增益高,是由于采用了阻值很大的板极负载,再加之廉栅压只使其为板压的1/10左右,故使电子管的放大倍数大为提高.因为负载电阻大,板压低,所以噪声 Usually a pentode amplifier maximum gain, but about 250 times, but this so-called “hungry current” amplifier, an ordinary five-pole amplifier gain can be increased to about 1000 times, but the noise can be reduced. High gain is due to the use of The resistance of a very large board load, coupled with the gate pressure only makes it a board pressure of about 1/10, so that the magnification of the tube greatly improved because of the load resistance, low plate, so the noise