The term operational amplier or “op-amp” refers to a class of high-gain DC coupled ampliers with two inputs and a single output. The modern integrated circuit version is typi ed by the famous 741 op-amp. Some of the general characteristics of the IC version are :
– High gain, on the order of a million
– High input imp edance, lo w output imp edance
– Used with split supply , usually +/- 15V
– Used with feedback, with gain determined by the feedback network.
The operational amplier (op-amp) was designed to perform mathematical operations. Although
now superseded by the digital computer, op-amps are a common feature of modern analog electronics.
The op-amp is constructed from several transistor stages, which commonly include a dierentialinput
stage, an intermediate-gain stage and a push-pull output stage. The dierential amplier
consists of a matched pair of bipolar transistors or FETs. The push-pull amplier transmits a large
current to the load and hence has a small output impedance.
CD3699 is an echo / surround sound processor circuit applied to an echo sound effects and surround sound audio processing equipment.
Limit parameter :
1. Extreme working voltage : -0.3 ~ 6V
2. Working temperature : -25 ~ 70°C
3. Extreme power consumption : 1.7W
4. Storage temperature : -40 ~ 125°C
1. low distortion
2. high signal to noise ratio
3. Simple peripheral lines
4. Auto reset function
5. Echo delay time can be easily adjusted
6. You can select the echo mode. Main tone Echo output together or surround sound mode Only echo output