This note will review the process by which VCO (Voltage Controlled Oscillator) designers choose their oscillator’s topology and devices based on performance requirements, components types and DC power requirements.

This letter proposes a high-power and high-efficiency GaN-HEMT voltage-controlled oscillator (VCO). The VCO consists of a coupled-line coupler, an inverse class-F amplifier, and a novel frequency-tunable stepped-impedance resonator (SIR).

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency.

2025年2月1日 · Two novel VCOs using n-type MOTFT technology with improved linearity. The VCOs achieve low power consumption of 247.2 μ W and 127.2 μ W with compact designs. Experimental results demonstrate linear frequency tuning with minimal errors (2.46% and 2.39%). Conversion functions verified with an SNDR of 40.75 dB and 40.82 dB, respectively.

This paper presents a comprehensive comparative analysis of five established voltage-controlled oscillator (VCO) architectures alongside a novel design. Utilizi

2022年6月7日 · This brief overviews the development of high-performance single-core voltage-controlled oscillators (VCOs) employing a multi-LC tank over the past two decades.

This VCO is designed for narrow band VCO applications (up to10%). It offers frequencies from 30MHz to 1.7GHz, very Low Phase Noise, Low Harmonics, and Excellent Linearity throughout its tuning range.

In digital modulation scheme the VCO’s Phase Noise affects the Bit Error Rate requirements. High Pushing (change of the oscillation frequency with supply voltage) can cause Phase Noise degradation due to increased sensitivity to the power supply noise. Phase Noise varies typically by 3dB with temperature, in the –55oC to +85oC range.

2024年12月1日 · The implementation and analysis of a VCO having high-frequency and low-power dissipation is presented in this study. The design employs current-starving technique, in which the amount of current for each inverter stage is limited.

2025年3月1日 · This article proposes Thermal and High frequency noise suppressed LCVCO (TH-LCVCO) technique. The TH-LCVCO technique incorporates a parallel capacitive filter to get rid of thermal noise at high frequencies and an LC tail filter to reduce the second-order harmonics. These techniques help to achieve low phase noise in all 16 tuning bands.