The offer of information grows rapidly in mobile markets. The DVB-H standard as a part of DVB-T is an important carrier of information to a broad spectrum of consumers. New, cheap and robust receivers have to be developed, especially for handheld devices. We propose a high-speed operational amplifier for a low-pass filter in a direct conversion receiver. In order to integrate the receiver on a system on chip, it is designed in 65 nm low-power CMOS. The operational amplifier is a four-stage feed-forward nested Miller compensated fully differential operational amplifier with an AB output stage. A gain-bandwidth product of 1GHz and a gain of 58 dB is reached. A load capacitance of 5 pF can be driven at a phase margin of 62 deg.
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发表于 2018-7-14 14:41:43
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