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| Questions about AGC and ADC in GPS systems. | ||
| Author nnxd Views 5 Posted at 2008/8/27 14:56 [View In Forum] | ||
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Hi, I have some questions about AGC and ADC in GPS systems. dgihqul dgihqul dgihqul dgihqul In GPS systems, dgihqul dgihqul dgihqul dgihqul 1. how long response time could tbe AGC loop have?dgihqul dgihqul dgihqul dgihqul 2. should there be a differential-to-single-ended amplifier between AGC and ADC?dgihqul dgihqul dgihqul dgihqul 3. GPS use BPSK modulation and dgihqul dgihqul in the paper "A 19-mW 2.6-mm2 L1/L2 Dual-Band CMOS GPS Receiver", dgihqul dgihqul the 2 bit ADC is different from definition of ADCs in the book. dgihqul dgihqul Decided from BPSK modulation, amplitude and sign judgement are ok. dgihqul dgihqul Is it so?dgihqul dgihqul dgihqul dgihqul 4. The AGC loop is easy to oscilate for the gain is high(more than 70dB). dgihqul dgihqul Are there any important things in gain distribution?dgihqul dgihqul dgihqul dgihqul Thanks! |
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