Design the 0.18 .mu.m Technology and Ku-Band VCO Using Transformers Feedback Topology

Recently, the electric products are indispensable due to achieve high-speed and high functionality and combine with the wireless communication. The data transmission way changes from wire to wireless. The wireless communication products are demanded to high function, economy, lightness, thinness, shortness and minimization. The challenge of RF design is up to and above 10 GHz using 0.18 μm technologies. The Voltage Control Oscillator is the core of RF receiver systems. To achieve high performance and small area of VCO circuit, using the transformers instead of inductor is one of the better way due to the transformers can improve the Q-factor. In this proposal, we will use PGS transformers feedback topology in VCO circuit to achieve low phase noise and Ku band operation frequency due to high Q-factor of transformers. The resonator is Clapp structure. In the following is our proposed plan for this 2 years project. 1st year: 1. First, we choice the topologies and circle numbers of the transformers in appropriate frequency to achieve accurately RF circuit design. 2. Design, simulation and tape-out the transformers in CIC. 3. Measurement and analysis the S-parameters and noise for transformers. 2nd year: 4. To develop the transformers model. 5. According to transformers model, we design the Ku-band transformer feedback voltage control oscillator using 0.18 μm technology in CIC and measure the phase noise and tuning range.

Project ID:PB9808-2367
External Project ID:NSC98-2221-E182-024