femto的lia-bv(d)-150系列的锁定放大器被设计了能在emi-设计情况下操作的19 ¹¹板,它能提供好的保护可能性和抑噪声的可能性。另外，它是多性能、多通道系统的选择。
锁定放大器本质上是一个频率选择交流电压表。它用于测量微弱信号（nv范围），这些信号可能被比信号高得多的背景噪声所隐藏。测量过程也称为载频法或相敏检测。锁定放大器从大多数不需要的频率的混合中选择具有特定频率和相位的信号。
测量原理：生成正弦参考频率（载波频率）并将其传送到测量对象，测量对象对其进行调制。产生的调幅测量信号在锁定放大器中被放大，通过带通滤波器，到达同步整流器（或解调器、相敏解调器(psd)、乘法器或混频器）。信号的整流是通过乘以参考频率来完成的。整流后的电压被均衡和再放大。
model
lia-bv-150-l
lia-bv-150-h
lia-bvd-150-l
lia-bvd-150-h
working frequency
5hz…10khz
50hz...120khz
5 hz ... 10 khz
50 hz ... 120 khz
time constants
3ms-10s
6 or 12 db/oct.
300 µs - 1 s
6 or 12 db/oct.
3 ms - 10 s
6 or 12 db/oct.
300 µs - 1 s
6 or 12 db/oct.
outputs
x = inphase, x = in phase, y = ,
10 v fullscale, r = magnitude, 10 v full scale,
short-circuitprotected, short-circuit protected,
monitoroutput monitor output
sensitivity (full scale)
voltage: 3 µv - 1 v in 1-3-10 steps
current: 30 pa - 10 µa in 1-3-10 steps
voltage input
true-differential instrumentation amplifier, noise 12nv/√hz
current input
transimpedance amplifier, gain 100 kv/a, noise 0.4pa/√hz
signal filter
highpass 0.2 hz - 1 khz and lowpass 100 hz - 1mhz,
user selectable
reference input
100 mv to 5 v, switchable to ttl
phase
adjustable 0° - 360° with 8 bit resolution,
temperature drift<0,01°/°c
max. dyn. reserve
80 db
digital control
16 ttl/cmos inputs: 8 bit phase, 4 bit time constant, 4bit sensitivity
power supply
±15 v, +120 ma / -60 ma
dimensions
160 x 100 x 20 mm (l x w x h), weight 100 g (0.22lbs)