A PLL frequency synthesizer and Gilbert cell multiplier for a 916 MHz ISM band transmitter realized in 0.5 [mu]m [i.e. micrometer] CMOS technology

Author

James C. Arnott

Date of Award

12-1999

Degree Type

Thesis

Degree Name

Master of Science

Major

Electrical Engineering

Major Professor

James M. Rochelle

Abstract

This thesis is a study of the design of a 3^rd order phase lock loop (PLL) and Gilbert cell multiplier to implement a 916MHz ISM band transmitter in 0.5μm CMOS technology. The transmitter is designed for implementing distributed biosensor systems for environmental monitoring.

The transmitter is described from a system level with the discussion of design issues concerning system topology and communication signal requirements as related to project requirements. The PLL system is described as a negative feedback system and important design considerations are discussed. Each PLL and transmitter system component is analyzed and discussed. A prototyped double balanced Gilbert cell multiplier with a power gain of 8dB, -10dBm compression point, and dissipates 7.2mW of power is analyzed and presentedThe analysis and design of a prototyped current mode logic frequency divider with a fixed division factor of 256 is presented. The frequency divider dissipated 15mW of power for a -20dBm 916 MHz input signal with a maximum operating frequency of 1.8 GHz. An off-chip LC tank voltage controlled oscillator was prototyped with a tuning range of 120 MHz, dissipated 3.3mW, -15dBm single-ended output signal, and had a phase noise performance of -60dBc at a 10 kHz offset and -80dBc at 100 kHz offset is analyzed and presentedThe design and simulation issues of a digital phase frequency detector (PFD), charge pump, and loop filter is presented. The charge pump was designed to source or sink a 10 μA current for an output voltage to within 0.1 V of the power supply voltages. Results show that the final transmitter can be successfully implemented with the prototyped and simulated transmitter components.

Recommended Citation

Arnott, James C., "A PLL frequency synthesizer and Gilbert cell multiplier for a 916 MHz ISM band transmitter realized in 0.5 [mu]m [i.e. micrometer] CMOS technology. " Master's Thesis, University of Tennessee, 1999.
https://trace.tennessee.edu/utk_gradthes/9770