On Thursday, Morincov said at the Washington Economic Club: "We think the offer is simply unacceptable, too far, at least in my opinion and of course ultimately at the board's discretion."
If Broadcom wish to achieve this acquisition, it will become the science and technology industry's largest transaction ever.
This is the first time Qualcomm CEO publicly talked about this offer. He said he is confident of the company's ability to operate independently and solve legal disputes in the future. These disputes are threatening Qualcomm's patent licensing business. Qualcomm is the world's largest mobile phone chip maker.
He pointed out that Broadcom and Qualcomm started talks on the possible merger between the two sides last year, but with no progress.
"We've talked about before," he said. "The semiconductor industry is experiencing an integration period, so companies have been discussing the possibility of mergers."