High Current Matching Over Full-Swing and Low-Glitch Charge Pump Circuit for PLLs
The Charge Pump (CP) based Phase-Locked Loop (PLL) includes a Phase Frequency Detector (PFD), a CP, a Low Pass Filter (LPF), a Voltage Controlled Oscillator (VCO) and a DIVider (DIV). A high current matching over full-swing and low-glitch charge pump circuit is proposed. The current of the CP is split into two identical branches having one-half the original current. The two branches are connected in source-coupled structure and a two-stage amplifier is used to regulate the common-source voltage for the minimum current mismatch.
Subscribe to the Innovation Insider Newsletter
Catch up on the latest tech innovations that are changing the world, including IoT, 5G, the latest about phones, security, smart cities, AI, robotics, and more. Delivered Tuesdays and Fridays