Gain • Up to 40 dB covers the majority of close-mic’d applications • Some situations require more than 70 dB • Variability of input levels requires adjustable gain over a very wide range Phantom Power • Required for many microphones • Standardized in IEC EN 61938 48 Volts +/- 4V at up to 10 mA per microphone • On / off control ... Since we have 4 bits on top and 4 bits below the middle 4 bits, the loop itself provides ±24 dB automatic gain control range without using RF and IF gain stages. The second example shown (b) is a more general case. The BB modem will receive 10 bits while the loop provides ±6 dB gain control range without engaging RF and IF gain blocks. TOUCH CONTROL STEP DIMMER LIGHT SWITCH WITH AUTOMATIC GAIN CONTROL (AGC), LS7541 datasheet, LS7541 circuit, LS7541 data sheet : LSI, alldatasheet, datasheet, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, and other semiconductors. the VGA controlled by the AGC. The VGA/AGC combi-nation is capable of varying the gain from 20dB to 0dB. The output amplifier is the final stage in which a fixed Jun 15, 2017 · The LM386 IC has got 8 pins which require very few external components to work as a mono amplifier. The circuit below is taken from the datasheet and shows the external components required for constructing a mono-channel audio amplifier with LM386. An external 10K potentiometer at the input is used to control the volume of the output speaker.