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| The Design of Mixed-Mode AGC |
| Li Xue-chu; Gao Qing-yun; Qin Shi-cai |
| Department of Microelectronics Science, Nankai University, Tianjin 300071, China |
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Abstract A mixed-mode AGC is proposed in this paper. The peak value of the output signal is detected by an analog peak detector. The detected peak is then processed by the following comparator and control logic. The gain of the VGA is controlled by the output of the control logic. The AGC is designed based on 0.25μm standard CMOS technology. The supply voltage is 2.5V. The simulation results show that the amplitude of the output signal is 800mV±25mV when the input amplitude ranges from 100mV to 1.3V. The THD of the output signal is less than –45dB when the input amplitude is 1V, and the power consumption is 10mW.
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Received: 14 August 2006
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2007, Vol. 29 
