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Altera_Forum
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15 years ago

Fixed-point multiplication with "altmult_complex" megafunction

Hi, I am using the altmult_complex (complex multiplier) with inputs dataa (both real and imaginary) having 16 fractional bits, and inputs datab (both real and imaginary) having 2 decimal bits a...
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Altera_Forum
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15 years ago

I read somewhere that multiplying two signed n-bits would result in 2n-bits with the first to msb being sign bits. For example, 16-bit signed times 16-bit signed gives 32-bit signed with bits 31 and 30 sign bits.

- Is this true?

(i got the above question after looking at --> http://www.edaboard.com/thread140547.html)

Next, would multiplying a 16-bit signed with a 18-bit signed give a 34-bit signed with first two msb as sign bits?

Appreciate your reply.