Title :
Double-differential recording and AGC using amplifier ASIC
Author :
Deng, Shin-Liang ; Li, Chun-Yi ; Rieger, Robert
Author_Institution :
Electr. Eng. Dept., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
An automatic gain control circuit (AGC) and a circuit for double-differential (DD) recording are implemented using an integrated variable gain circuit. The integrated circuit enables gain trimming by variation of the chip clock timing. A microcontroller is used to provide the clocks. AGC and DD setups with a simple 2-chip and 3-chip system respectively are realized. Measured results confirm a gain tuning range of 22.7 dB and interference suppression of 41.4 dB in the balanced DD arrangement, and power consumption of 318 μW.
Keywords :
amplifiers; application specific integrated circuits; automatic gain control; clocks; interference suppression; microcontrollers; recording; 2-chip system; 3-chip system; AGC; DD recording; amplifier ASIC; automatic gain control circuit; chip clock timing; double-differential recording; gain 22.7 dB; gain 41.4 dB; integrated variable gain circuit; interference suppression; microcontroller; power 318 muW; power consumption; Automatic generation control; Gain; Gain control; Microcontrollers; Oscilloscopes; Semiconductor device measurement; System-on-a-chip;
Conference_Titel :
SOC Conference (SOCC), 2011 IEEE International
Conference_Location :
Taipei
Print_ISBN :
978-1-4577-1616-4
Electronic_ISBN :
2164-1676
DOI :
10.1109/SOCC.2011.6085121
