I asked Oberweis what was driving the sector. One reason, he said, that stocks are moving up is that they are a leading indicator. Investors view the economy as improving and believe that sales of hardware and software will increase in the years ahead. Another reasons is that tech stocks were hit hard, and a lot of good news has not yet been priced in. Oberweis also thinks that many tech stocks will surprise to the upside during the next earnings season.

"I don't expect robust spending but I do think it will be easier for companies to grow off a much lower base – which is where we are now," says Oberweis.

Among the areas where he sees promise: companies that provide network security, companies that route traffic and those that are meeting rising bandwidth demands of voice-over-IP and with apps like smart phones.

To take advantage of the rebound there are three stocks that Oberweis recommends:

Synaptics, Incorporated (NASDAQ: SYNA) Synaptics is a company which makes the interface for PCs and smart phones. Oberweis says its a great way to play the growth in tech because you don't need to make a bet on any one product, but on touch interfaces of many smartphones. Although Synaptics' touch screens are not used by Apple, the company has secured design wins for competing smart phones from Research In Motion Ltd. (NASDAQ: RIMM), Nokia Corporation (NYSE: NOK), and LG. The company grew revenues 28% year-over-year last quarter and had 42% gross margins.

Another company Oberweis likes is Starent Networks Corp. (NASDAQ: STAR) which manufactures wireless infrastructure equipment used by cell phone providers to deliver high-speed functionality to their customers. Starent's equipment is the backbone that helps wireless networks operate at broadband speeds. The company grew revenues 30% year-over-year last quarter and had 80 % gross margins.

Finally, Oberweis says that investors should look at Netlogic Microsystems, Inc. (NASDAQ: NETL) which designs "knowledge-based" processors that allow network providers to prioritize network traffic, slowing down low priority traffic like emails and accelerating delivery of high-priority traffic like streaming video. Network optimization helps make video-on-demand a reality. The company saw revenues contract last quarter because of the slumping economy but had 69% gross margins. Revenue growth should re-accelerate in the coming quarters.

For a full analysis of Jim Oberweis' views on a tech rebound, click here