视频一区视频二区在线观看_国产欧美激情在线观看_免费的av网址_莫妮卡裸全乳无删减电影_免费的一级黄色片_福利姬免费_欧美jizz19性欧美_在线观看免费视频国产_日本免费三级电影_亚洲tv在线_很黄很色的视频_亚洲免费视频一区_91黄色影视_草莓视频.www_成人欧美一区二区三区白人

The LT?5554 is a 7-bit digitally controlled programmable gain (PG) amplifi er with 16dB gain control range. It consists of a 50Ω input variable attenuator, followed by a high linearity variable transconductance amplifi er. The coarse 4dB input attenuator step is implemented via 2-bits of digital control (PG5, PG6). The fi ne transconductance amplifi er 0.125dB step within 3.875dB gain control range is set via 5-bits digital control (PG0 to PG4). The LT5554 gain control inputs (PGx) and the STROBE input can be directly coupled to TTL or ECL drivers. The seven parallel gain control inputs time skew can be eliminated by using the STROBE input positive transition.