lock in amplifier是什么意思

英语翻译
The power amplifier is offered both in die form and in a soon to be released ceramic flanged package.

英语翻译
我家有一台YAMAHA DIGITAL KARAOKE PROCESSING AMPLIFIER AV-690 ,上面有一个环绕声（SURROUND）效果之类的,有SWITCH,STEREO,THEATER,HALL,SUP.BASS,DJ.TALK,VOCAL,LOUDNESS好几个,

英语翻译
the output of the amplifier ,which is an increased reproduction of input voltage,goes to the speaker

英语翻译
The LM4871 is a bridge-connected audio power amplifier
capable of delivering
typically 1.1W of continuous average
power to an 8W load with 0.5% (THD) from a 5V power supply.

英语翻译
A wideband amplifier is described which utilizes two
different channels for the amplification of the high- and
low-frequency components of the input signal.Due to
the unique feedback configuration,the low-frequency
channel contributes only where the gain of the highfrequency
channel decreases.Therefore,there is no need
for frequency splitting at the input.
Commercially available operational amplifiers,utilizing
either current or voltage feedback,are limited at
moderate gains of for instance ten-fold to an upper
frequency in the range of 100–300 MHz; which results in
transition times of from one to several nanoseconds.
They also have the drawback of possessing high input
currents.If wider frequency ranges and low input
currents are required,the described method for the
construction of a wideband dc-coupled amplifier becomes
appropriate,especially in as much as today
integrated microwave amplifiers with an upper frequency
of several gigahertz are available at low prices
as do transistors with transition frequencies in the
gigahertz range.

请翻译an error amplifier with access to the inverting input and output is provided

英语翻译
The output buffer is a gain-of-2 noninverting amplifier capable of generating rail-to-rail voltages at its output,
which gives an output range of 0 V to V
DD
.It is capable of driving a load of 2 kΩ in parallel with 1000 pF to GND.
The source and sink capabilities (fast settling) of the output amplifier can be seen in the typical curves.The slew
rate is 1 V/µs with a full-scale settling time of 10 µs with the output loaded.The feedback and gain setting
resistors of the amplifier are in the order of 50 kΩ.Their absolute value can be off significantly,but they are
matched to within 0.1%.

英语翻译
The Operational Amplifier
one problem with electronic devices corresponding to the generalized amplifiers is that the gains,Au or Ai,depend upon internal properties of the two-port system.This makes design difficult since these parameters usually vary from device to device,as well as with tenperature.The operational amplifier,or OP-Amp,is designed to minimize this dependence and to maximize the ease of design.An OP-Amp is an integrated circuit that has many component parts such as resistors and transistors built into the device.At this point we will make no attempt to describe these inner workings.

英语翻译
The LM4871 is a bridge-connected audio power amplifier
capable of delivering
typically 1.1W of continuous average
power to an 8W load with 0.5% (THD) from a 5V power supply.

英语翻译
Opto-Drive AM-FM tuneg amplifier
High fidelity and high musicality steaeo equipment
Designed by sophisticated technology