A 56–65 GHz Injection-Locked Frequency Tripler With Quadrature Outputs in 90-nm CMOS

Microelectronics & Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc

A Wideband Millimeter-Wave Power Amplifier With 20 dB Linear Power Gain and +8 dBm Maximum Saturated Output Power

Microelectronics & Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc

Adaptive multi-standard circuits and systems for wireless communications

Electrical Engineering, Mathematics and Computer Scienc

A 56.4-to-63.4 GHz Multi-Rate All-Digital Fractional-N PLL for FMCW Radar Applications in 65 nm CMOS

A mm-wave digital transmitter based on a 60 GHz all-digital phase-locked loop (ADPLL) with wideband frequency modulation (FM) for FMCW radar applications is proposed. The fractional-N ADPLL employs a high-resolution 60 GHz digitally controlled oscillator (DCO) and is capable of multi-rate two-point FM. It achieves a measured rms jitter of 590.2 fs, while the loop settles within 3 ?s. The measured reference spur is only –74 dBc, the fractional spurs are below –62 dBc, with no other significant spurs. A closed-loop DCO gain linearization scheme realizes a GHz-level triangular chirp across multiple DCO tuning banks with a measured frequency error (i.e., nonlinearity) in the FMCW ramp of only 117 kHzrms for a 62 GHz carrier with 1.22 GHz bandwidth. The synthesizer is transformer-coupled to a 3-stage neutralized power amplifier (PA) that delivers +5 dBm to a 50 ? load. Implemented in 65 nm CMOS, the transmitter prototype (including PA) consumes 89 mW from a 1.2 V supply.Microelectronics & Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc

High resolution millimeter wave digitally controlled oscillator with reconfigurable distributed metal capacitor passive resonators

A novel and useful millimeter-wave digitally controlled oscillator (DCO) that achieve a tuning range greater than 10% and fine frequency resolution less than 1 MHz. Switched metal capacitors are distributed across a passive resonator for tuning the oscillation frequency. To obtain sub-MHz frequency resolution, tuning step attenuation techniques are used that exploit an inductor and a transformer. A 60-GHz fine-resolution inductor-based DCO (L-DCO) and a 60 GHz transformer-coupled DCO (T-DCO), both fabricated in 90 nm CMOS, are disclosed. The phase noise of both DCOs is lower than -90.5 dBc/Hz at 1 MHz offset across 56 to 62 GHz frequency range. The T-DCO achieves a fine frequency tuning step of 2.5 MHz, whereas the L-DCO tuning step is over one order of magnitude finer at 160 kHz.MicroelectronicsElectrical Engineering, Mathematics and Computer Scienc

Wideband FM demodulation by injection-locked division of frequency deviation

A novel and useful wideband FM demodulator operating across an 8 GHz IF bandwidth for application in low-power, wideband heterodyne receivers. The demodulator includes an n-stage ring oscillator that is injection locked to a wideband input signal. Locking to the input frequency, it divides the FM deviation by n, thereby facilitating as well as reducing the energy required for wideband demodulation. The quadrature-phased output of the ring oscillator is auto correlated using a low-power folded CMOS mixer capable of detecting FM up to 400 Mb/s over a 2-10 GHz IF frequency range.MicroelectronicsElectrical Engineering, Mathematics and Computer Scienc