Balancing analog layout parasitics in MOSFET differential pairs

The MOSFET differential pair is a key part of many analog circuits e.g. opamps, comparators, LDOs, etc. A differential pair applies gain to the difference between two signals and has many advantages over single-ended amplifier circuits, e.g. noise reduction and suppression of common-mode signals and DC offset. However, these advantages rely upon precisely matched circuit components and symmetrical layout with balanced parasitics. In this webinar, Paul Clewes looks at how to achieve a carefully balanced differential pair layout and considers the layout effects that impact the performance of a differential pair. Along the way, Paul demonstrates how to use Pulsic’s Animate Preview technology to accelerate the layout of this important analog building block.