Motorola (NYSE: MOT) investment arm is on a funding spree. This time Motorola Ventures is funding Zenverge, an advanced media integrated circuits company. Other investors in the undisclosed round include DCM and Norwest Venture Partners. Zenverge’s financing will support production of a family of circuits for digital HD convergence. Release.

For those keeping track, this is at least the company’s fourth investment in as many months. The other recent investments include: TuneWiki, Scanbuy, and Sensitive Object. The copanies cover a wide range of sectors including music services, multi-touch capabilities and barcode-scanning technology.

Zenverge’s focus is perhaps more intended for Motorola’s set-top business, although portable devices is include in its portfolio. Its circuits are being incorporated into HDTVs, Blu-ray/DVD players, set-tops, and other equipment.