A 5.2 mW 240---550 MHz continuous-time low-pass filter and VGA for a UWB receiver in 0.18 μm CMOS process

  • Authors:

  • Mostafa Savadi Oskooei;N. Masoumi;M. Kamarei

  • Affiliations:

  • School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran 14395-515;School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran 14395-515;School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran 14395-515

  • Venue:
  • Analog Integrated Circuits and Signal Processing
  • Year:
  • 2008

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Abstract

A very low-power wide-band CMOS continuous-time low-pass filter for a ultra wideband system receiver in 0.18-μm CMOS technology is proposed. The cutoff frequency of the fourth-order LPF can be tuned within 240---550 MHz. The gain of the filter is tuned about 44 dB which can omit the variable gain amplifier (VGA) block. An IIP3 of 17.4 dBm is achieved for a power consumption of 5.2 mW from a 1.8 V power supply. Merging LPF and VGA into one block can efficiently reduce the power consumption and the chip area of the analog baseband channel while achieving a high linearity.