LC quadrature generation in integrated circuits

Christensen, K.T.

doi:10.1109/iscas.2001.921783

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…When the two-stage LNA operates in high gain mode, it achieves an input P1 dB of −15.5 dBm and an input IP3 of 0 dBm. The mixer is a conventional double-balanced passive mixer [ 14 ], and the IQ generator is an LC-type poly-phase filter [ 15 ]. The I-Q LO signals drive the gate of the passive mixers, and the LNA output current signals are amplified through the TIA.…”

Section: Design Of 24 Ghz 1tx-2rx Fmcw Radar Transceivermentioning

confidence: 99%

Fully Integrated 24-GHz 1TX-2RX Transceiver for Compact FMCW Radar Applications

Ko,

Moon,

Kim

et al. 2024

Sensors

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A fully integrated 24-GHz radar transceiver with one transmitter (TX) and two receivers (RXs) for compact frequency modulated continuous wave (FMCW) radar applications is here presented. The FMCW synthesizer was realized using a fractional-N phase-locked loop (PLL) and programmable chirp generator, which are completely integrated in the proposed transceiver. The measured output phase noise of the synthesizer is −80 dBc/Hz at 100 kHz offset. The TX consists of a three-bit bridged t-type attenuator for gain control, a two-stage drive amplifier (DA) and a one-stage power amplifier (PA). The TX chain provides an output power of 13 dBm while achieving <0.5 dB output power variation within the range of 24 to 24.25 GHz. The RX with a direct conversion I-Q structure is composed of a two-stage low noise amplifier (LNA), I-Q generator, mixer, transimpedance amplifier (TIA), a two-stage biquad band pass filter (BPF), and a differential-to-single (DTS) amplifier. The TIA and the BPF employ a DC offset cancellation (DCOC) circuit to suppress the strong reflection signal and TX-RX leakage. The RX chain exhibits an overall gain of 100 dB. The proposed radar transceiver is fabricated using a 65 nm CMOS technology. The transceiver consumes 220 mW from a 1 V supply voltage and has 4.84 mm2 die size including all pads. The prototype FMCW radar is realized with the proposed transceiver and Yagi antenna to verify the radar functionality, such as the distance and angle of targets.

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Section: Design Of 24 Ghz 1tx-2rx Fmcw Radar Transceivermentioning

confidence: 99%

Fully Integrated 24-GHz 1TX-2RX Transceiver for Compact FMCW Radar Applications

Ko,

Moon,

Kim

et al. 2024

Sensors

View full text Add to dashboard Cite

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A high-performance CMOS multiphase voltage-controlled oscillator for communication systems

Sheen

Chen

Lee

2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353)

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A multiphase oscillator employing the phase-setting and oscillation-generation units was developed for modem communication systems. The phasesetting unit includes multiple cascading phase-shifting cells of which number determines phase differences of output signals. The oscillation-generation unit consists of multiple oscillators to trigger the phase-setting unit. The configuration of the phase setting and oscillation generation isolated in two units can make the proposed multiphase oscillator having good oscillation quality and high phase accuracy. In addition, a voltage-controlled ring oscillator capable of generating two oscillation signals with a phase difference of 180' is designed. It not only decreases the settling time of the multiphase oscillation system, but it also reduces the power dissipation due to its simplicity. By using the TSMC lP6M 0.18pm CMOS technology, the proposed multiphase voltage-controlled oscillator (VCO) can yield oscillation signals ranging from 2.37GHz to 2.53GHz at a supply voltage of 1.8V. There are 8 oscillation signals with phase differences of 45", 90", 13S0, 180", 225", 270", 315O and 360". Power dissipation is around 4.21mW to 4.88mW. Therefore, the multiphase VCO proposed herein can be widely used in various integrated communication systems, providing multi-phase signals at a high-quality manner.

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On the Design of <inline-formula> <tex-math notation="LaTeX">$n$ </tex-math> </inline-formula>th-Order Polyphase All-Pass Filters

Asoodeh

Mirabbasi

2019

IEEE Trans. Circuits Syst. I

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LC quadrature generation in integrated circuits

Cited by 3 publications

References 3 publications

Fully Integrated 24-GHz 1TX-2RX Transceiver for Compact FMCW Radar Applications

Fully Integrated 24-GHz 1TX-2RX Transceiver for Compact FMCW Radar Applications

A high-performance CMOS multiphase voltage-controlled oscillator for communication systems

On the Design of <inline-formula> <tex-math notation="LaTeX">$n$ </tex-math> </inline-formula>th-Order Polyphase All-Pass Filters

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