Title :
A 480 μW 2 GHz ultra low power dual-modulus prescaler in 0.25 μm standard CMOS
Author_Institution :
Dept. of Wireless, Technol. & Innovation, Infineon Technol. AG, Munich, Germany
Abstract :
A dual modulus 128/129 prescaler is presented, consuming 480 μW at a power supply voltage of 1.8 V and an input frequency of 2 GHz or 98 μW at a power supply voltage of 1.5 V and an input frequency of 1 GHz. The prescaler was realized in Infineon 0.25 μm standard CMOS process using single-phase clocked flipflops in the phase-switching prescaler architecture. The circuit was optimized for minimal power drain, maintaining a maximum operating frequency of at least 2 GHz. Measured maximal frequency of operation of the prescaler was 2.5 GHz. A co-integration of the prescaler with a voltage controlled LC-oscillator showed no detoriation of the -110 dBc/Hz phase-noise performance of the VCO at 100 kHz frequency offset, thus proving the practical use of the circuit for synthesizers
Keywords :
CMOS logic circuits; flip-flops; frequency synthesizers; high-speed integrated circuits; low-power electronics; mixed analogue-digital integrated circuits; prescalers; voltage-controlled oscillators; 0.25 micron; 1.5 to 1.8 V; 2 to 2.5 GHz; 98 to 480 muW; Infineon CMOS process; LC VCO; VCO phase-noise performance; dual-modulus prescaler; phase-switching prescaler architecture; prescaler/VCO co-integration; single-phase clocked flip-flops; synthesizer application; ultra low power prescaler; voltage controlled LC-oscillator; CMOS logic circuits; CMOS process; CMOS technology; Clocks; Energy consumption; Frequency conversion; Phase locked loops; Power supplies; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.857608
