Multilayer Coplanar Waveguide Transmission Lines Compatible with Standard Digital Silicon Technologies

IEEE J. Solid-State Circuits

Zuegel

Marciante

et al. 2009

Self Cite

Abstract-A new circuit technique, the distributed waveform generator (DWG), is proposed for low-power ultra-wideband pulse generation, shaping and modulation. It time-interleaves multiple impulse generators, and uses distributed circuit techniques to combine generated wideband impulses. Built-in pulse shaping can be realized by programming the delay and amplitude of each impulse similar to an FIR filter. Pulse modulation schemes such as on-off keying (OOK) and pulse position modulation (PPM) can be easily applied in this architecture. Two DWG circuit prototypes were implemented in a standard 0.18 m digital CMOS technology to demonstrate its advantages. A 10-tap, 10 GSample/s, single-polarity DWG prototype achieves a pulse rate of 1 GHz while consuming 50 mW, and demonstrates OOK modulation using 16 Mb/s PRBS data. A 10-tap, 10 GSample/s, dual-polarity DWG prototype was developed to generate UWB pulses compliant with the transmit power emission mask. Based on the latter DWG design, a reconfigurable impulse radio UWB (IR-UWB) transmitter prototype was implemented. The transmitter's pulse rate can be varied from 16 MHz range up to 2.5 GHz. The bandwidth of generated UWB pulses is also variable, and was measured up to 6 GHz ( 10 dB bandwidth). Both OOK and PPM modulation schemes are successfully demonstrated using 32 Mb/s PRBS data. The IR-UWB transmitter achieves a measured energy efficiency of 45 pJ/pulse, independent of pulse rate.

Section: Circuit Implementationmentioning

confidence: 99%

Distributed Waveform Generator: A New Circuit Technique for Ultra-Wideband Pulse Generation, Shaping and Modulation

IEEE J. Solid-State Circuits

Zuegel

Marciante

et al. 2009

Self Cite

“…To achieve the large analog bandwidth, the distributed circuit technique can be utilized without any active power consumption [21].…”

Section: Distributed Pulse Generation and Detectionmentioning

confidence: 99%

Energy efficient, reconfigurable, distributed pulse generation and detection in UWB impulse radios

2009 IEEE International Conference on Ultra-Wideband

Wang

2009

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Abstract-Ultrafast pulse generation and detection are pivotal functions in ultra-wideband (UWB) impulse radios. This paper shows that digitally-assisted distributed circuit techniques provide an energy-efficient, reconfigurable solution for both functions, as demonstrated in two new circuits: a pulse generator that can generate reconfigurable pulse waveforms with subnanosecond time resolution, and a multi-GHz analog correlator that incorporates reconfigurable local template pulse generation. A UWB impulse radio was developed based on these new circuits with chip prototypes implemented in 0.18-µm standard digital CMOS. It was characterized using UWB antennas, and achieved an energy efficiency of 25-pJ/pulse for the transmitter and 190-pJ/pulse for the receiver at 250 MHz pulse rate in the measurement.

“…In the DPC (Fig.3), the delay per stage was designed at nominally 100-ps, which corresponds to a sampling rate of 10-GS/s. The transmission lines for the UWB pulse power distribution was implemented using a pair of multi-layer coplanar waveguides (MCPW) [13], which exhibit lower loss and larger bandwidth than LC artificial transmission lines in conventional CMOS distributed circuits.…”

Section: Receiver Prototype Implementationmentioning

confidence: 99%

A 0.17-nJ/pulse IR-UWB receiver based on distributed pulse correlator in 0.18-µm digital CMOS

2009 IEEE Radio Frequency Integrated Circuits Symposium

Wang

2009

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This paper presents a low power impulse-radio ultra-wideband (IR-UWB) receiver based on a reconfigurable, high speed analog correlator called distributed pulse correlator (DPC). The DPC incorporates built-in local template pulse generation, and hence significantly reduces the power consumption and circuit complexity of the analog correlation receiver. A chip prototype of the IR-UWB receiver was implemented in 0.18-µm standard digital CMOS, and achieved an energy efficiency of 0.17-nJ/pulse at 250-MHz pulse rate in the measurement.