Design of triple-band CMOS GPS receiver RF front-end

Abstract

This letter describes the design of a triple-band Global Positioning System (GPS) receiver that simultaneously covers the L1, L2 and L5 frequency bands. The proposed receiver uses an imagerejection technique that can separate signals from the three frequency bands to three corresponding ports. It uses a single RF path containing a low-noise amplifier (LNA), and active and passive mixers with a pair of local oscillator signals. The triple-band GPS RF front-end chip is fabricated using 130 nm CMOS technology, and has a noise figure of less than 7.1 dB and an S 11 coefficient of less than −10 dB in the frequency range 1.15-1.6 GHz. The experimental results demonstrate a 35-40 dB image rejection ratio at each output port with a power consumption of 7.2 mW (LNA and mixers) using a 1.2 V supply voltage.

A novel CMOS active polyphase filter with wideband and low-power for GNSS receiver

“…From the measurement, the fourstage polyphase filter shows that the voltage gain, the IP1 dB and IIP3 are 6.8 dB, −6.1 dBm and 3.8 dBm at 16 MHz, respectively. The performance is compared with [2], [3] and [5], which is shown in Table I. The proposed polyphase filter has much lower current dissipation per stage and higher passband gain while maintaining the same IRR per stage.…”

“…The passive polyphase filter introduced in [4,5] consists of resistances and capacitances, which can exhibit high image rejection ratio (IRR) and wide bandwidth by cascading several stages, but have disadvantages. Additional buffers should be employed compensate the loss caused by cascading, which increase significantly the power consumption.…”

Design and Simulation of Low Power Consuming Digital Controlled Oscillator in All Digital Phase Locked Loop

“…These were operated with different widths and provide various resistance values according to bit pattern variations in the circuit operation. Next paragraph gives the width details of PMOS (M1) & NMOS (M2) gates in inverter and NMOS (M4, M5, M6 & M7) gates in switch network and controlling NMOS (M3).All MOS gates switching characteristics depends on the gate source voltages (V gs ) and drain source voltages (V ds ) as for N channel gates V gs >V th > 0 &V ds > 0 and for P channel gates V gs <V th < 0 &V ds < 0 where V th is threshold voltage.In the previous work [5] the circuit simulated in 180nm technology and the present paper works on 150nm technology. In the switch network binary weighted NMOS & PMOS devices were used and delay of that stage is controlled by them.…”

“…Signal propagation frequency in the human body lies in the "Medical Implant Communication Service (MICS) band frequencies" ranging from 401 to 406 MHz (intra range is 402 to 405 MHz) and facilitates a happy medium between chip-size and power consumption. So MICS band frequencies are widely used for biomedical RF transceivers [5,6]. Designing of RF transceivers front-end in biomedical implantable devices is a tough task because they require extremely subjacent power devouring, tiny in size, itty-bitty external components and high fidelity devices.…”

A RF CMOS GNSS receiver with a passive mixer for GPS L1/Galileo E1/Compass B1 band

“…In recent years, global navigation satellite systems (GNSSs) have received noticeable research attention due to its ever-increasing influence on location-based services in a variety of civilian applications [1,2,3,4,5,6]. After the deployment of Global Position System (GPS) by the U.S., many other countries have engaged in developing their own GNSS systems, such as global navigation satellite system (GLONASS) from Russia, Galileo from the European Union, and Compass (also known as "BeiDou-2", or "BD-2") from China.…”