Abstract
A wideband and low power quadrature analog baseband was presented, both the receiver (RX) baseband and transmitter (TX) baseband consisted of variable gain amplifier (VGA), low pass filter (LPF) and DC offset cancellation (DCOC) circuit. The RX VGA adopted a modified Cherry-Hooper structure to achieve wide gain range while the TX VGA used a modified folded Gilbert structure to enhance input linearity. Both the RX LPF and TX LPF adopted eighth-order Gm-C filter structure with Nauta-OTA as the transconductance, featuring high bandwidth and high current efficiency to meet low power requirements. The chip had been implemented in Fujitsu 55 nm CMOS process and packaged in QFN64. All ports contained the electrostatic discharge protection (ESD) circuits. The measurement results show that the RX and TX baseband both realize 1.1 GHz 3 dB bandwidth while drawing 13.0 mA and 11.5 mA from 1.2 V power supply, respectively. The gain of RX baseband is ranged from -29 to 56 dB while maximum linear output amplitude (OP1 dB) is 4 dBm. The gain of TX baseband is ranged from -22.5 to 33.0 dB while maximum linear input amplitude (IP1 dB) is up to 6 dBm. The achieved performance is in accordance with 60 GHz wireless communication system requirements specified by IEEE 802.11ad, IEEE 802.15.3c and ECMA-387 protocols.
| Translated title of the contribution | A Wideband Low-power Baseband for 60 GHz High-speed Wireless Communication Systems |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 288-296 |
| Number of pages | 9 |
| Journal | Guti Dianzixue Yanjiu Yu Jinzhan/Research and Progress of Solid State Electronics |
| Volume | 39 |
| Issue number | 4 |
| State | Published - 25 Aug 2019 |