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This paper presents a novel design of a ring oscillator (RO) producing eight phases output with accurate signal phase adjustment. By using the pulse injection technique, the RO phase noise has been strongly suppressed. In addition, a novel phase control technique is proposed for the implementation of the phase modulation. The proposed RO achieves a phase(More)
This paper presents the design of a simple multiphase ring oscillator (RO). It represents a new technique for RO output signal phase control. This RO uses a voltage injection principle to produce different phases output signal. The proposed RO consumes only 3.6 mW from a 1.8V power supply while having an oscillation frequency of 5.5 GHz with a 330 MHz fine(More)
A 1.9 GHz film bulk acoustic resonator (FBAR) based complementary cross-coupled voltage-controlled oscillator (VCO) designed in 0.18 μm CMOS is presented. DC latch and low frequency instability problems have been solved by the cross-coupled pairs with DC block capacitors. The open loop gain has been analyzed and optimized by considering the effect of(More)
A novel low power 8-bit digitally controlled oscillator in 0.18 μm CMOS technology is designed and implemented. It consumes only 12.6 mW to oscillate at 3.44 GHz. Sub-feedback technique is used to produce stable quadrature output with even number of stages. Tuning frequency range is from 1.2 GHz to 3.44 GHz, i.e., it has tuning width of about 97%.(More)
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