欧美aaa级-男女高潮激烈免费观看-黑人性生活视频-精品人妻无码一区二区三区蜜桃一-亚洲第一成网站-国产一区中文字幕-国产精品videosex极品-天天摸天天射-国产精品特黄aaaa片在线观看-天天干网-免费观看黄网站-国产无遮挡a片无码免费-a天堂在线-亚洲免费色-中文字幕乱偷无码av先锋-中文天堂最新版资源www官网-国四虎影永久去哪里了-五月视频-91黄色免费网站-亚洲精品一区二区三区影院

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.