A radio frequency CMOS current controlled oscillator based on a new low parasitic resistance CCII

Abstract

In this paper we present a design of a current controlled oscillator in 0.35pm CMOS process. Owing to their high degree of controllability, the translinear second generation current conveyer is used as a basic block for our oscillator. Thus, the first step in our design was to improve static and dynamic behaviour of second generation current conveyors. The translinear implementation in CMOS technology was first studied. Then a considerable improvement of the parasitic series resistance on port X is done by proposing a new structure. A reduction of RX by nearly a factor of 10 is observed leading to a notable improvement of the frequency behaviour of the proposed oscillator. As an application example, a current controlled oscillator covering [IOOMHz600MHzI frequency range is proposed. Pspice simulation results are performed using CMOS 0.35 pm process of AMs.