Circuit and system design for an 860–960 MHz RFID reader front‐ends with Tx leakage suppression in 0.18 − µm CMOS technology

Radio frequency identification (RFID) is the utilization of the radio frequency for the purpose of identification. RFID is lagging behind due to vendor specific solutions and excessive implementation cost. A Wireless Fidelity (WiFi) compatible IEEE 802.11 RFID tag can overcome these limitations. IEEE 802.11 utilizes Direct Sequence Spread Spectrum (DSSS) technique and a matched filter is a vital block in a DSSS system. A low-power and low-area novel adder-less Barker matched filter is proposed in this paper by eliminating the conventional multiple multiplications. The matched filter designed in 0.18 mm CMOS technology achieves average and maximum power consumption of 33.747 mW and 8.08 mW, respectively and chip area of 0.41184 mm 2 only. The simulation result shows the correct matching of data against the threshold value. Compared with the conventional matched filter, the design achieves 25% power reduction (maximum power) and 51% chip area reduction. Therefore, the design will help to implement a low-power matched filter for IEEE 801.11 compatible RFID tag.

“…Then, the aperiodic autocorrelation function {a n }, denoted C a (t) for an integer chip delay t is given by (2). Barker sequences possess good aperiodic correlation.…”

Section: Proposed Adder-less Digital Matched Filter Architecturementioning

confidence: 99%

“…[1][2][3][4]. The utilization includes supply chain management, access control to buildings, public transportation, airport baggage handling, express parcel logistics, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a novel adder‐less Barker matched filter for RFID

Amin

Reaz

Jalil

2013

“…Mixer is one of the most important analog blocks in the wireless communication system. Typically, the Gilbert active mixers [1][2][3][4][5][6][7][8][9][10] are widely used in the wireless communication systems for their superior conversion gain and port to port isolation. However, conventional Gilbert active mixers generally consume a significant portion of the power of the transceiver, and the LV-LP mixers have received considerable attentions in recent years.…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of novel amplifier‐based mixer for ISM band wireless applications

Wang

Sun

2014

Summary This letter describes a low‐voltage low‐power (LV‐LP) 2.4‐GHz mixer for Industrial, Scientific and Medical (ISM) band wireless applications. The approach is based on a two‐stage amplifier, and the Gilbert switch stage is inserted between the two amplifier stages. The proposed amplifier‐based mixer delivers a remarkable conversion gain of 13 dB with a local oscillator (LO) power of 7 dBm, while consuming only 1.05‐mW DC power from a 0.8‐V supply voltage. The input‐referred third‐order intercept point (IIP3) of the mixer is 3.82 dBm, and the chip area is only 0.429 mm2. The results indicate that this mixer is suitable for the low‐voltage low‐power applications. Copyright © 2014 John Wiley & Sons, Ltd.

“…Therefore, the RFID sensitivity is mainly determined by the element featuring the lowest Q and/or the highest capacitance in the R-C equivalent of Figure 1(b) [20]. Recalling (5), P S can be rewritten as a function of C S and R S :…”

Section: Introductionmentioning

confidence: 99%

900 MHZ radio‐frequency identification rectifier with optimization and reusing of electro‐static discharges protections in 180 nm digital CMOS technology

Boni

Bigi

2014

Summary Sensitivity and electro‐static discharges (ESD) protection level are crucial parameters for any Ultra High‐Frequency (UHF) power rectifier–harvester designed for radio‐frequency identification (RFID) devices. While sensitivity limits the reading range of the interrogator‐to‐tag communication link, the requirement for an adequate protection against ESD is enforced in commercial devices connected to a printed antenna. Both resistive and capacitive parasitics of the protection circuits severely affect RF performance of the device. In the paper, a rectifier for UHF RFID embedding an ESD protection for 2 kV human‐body discharge model (HBM) level is proposed. The target of a low added parasitic capacitance is achieved by adapting the protection circuit to the RFID rectifier and reusing the ESD clamp for additional functions being mandatory in a UHF RFID front end. The layout of the ESD clamp has been optimized for minimum parasitic resistance without sacrificing the protection level. Two UHF harvesters were implemented in a 180 nm digital complementary metal‐oxide semiconductor (CMOS) technology, featuring a minimum sensitivity of −15.5 dBm with an ESD protection level of 2 kV HBM. Copyright © 2014 John Wiley & Sons, Ltd.