Telegent Systems, a Sunnyvale, Calif. company that makes chips for mobile TV, said it has raised $20 million in a third round financing.

Northern Light Venture Capital is the latest investor in Telegent, with existing Telegent investors participating. Total external investment in Telegent now totals $50 million. Previous investors include New Enterprise Associates and Walden International and Index Ventures.

Northern Light is a China-focused venture firm, where Telegent has a subsidiary.

Here’s the company’s announcement, and a snippet:

Telegent Systems is a leading fabless semiconductor company providing high performance, single-chip CMOS solutions enabling free-to-air and pay-per-view mobile TV in cellular phones and portable media devices. Telegent’s solutions deliver both analog and digital broadcast reception with unparalleled sensitivity and picture quality in mobile environments, ultra-low power consumption, and a small footprint simplifying mobile device design and manufacture.