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The PDSP16350 provides an integrated solution to the need for very accurate, digitised, sine and cosine waveforms. Both these waveforms are produced simultaneously, with 16 bit amplitude accuracy, and are synthesised using a 34 bit phase accumulator. The more significant bits of this provide 16 bits of phase accuracy for the sine and cosine look up tables. With a 20 MHz system clock, waveforms up t0 10 MHz can be produced, with 0.001 Hz resolution. If frequency modula- tion is required with no discontinuities, the phase increment value can be changed linearly on every clock cycle. Alterna- tively absolute phase jumps can be made to any phase value. The provision of two output multipliers allows the sine and cosine waveforms to be amplitude modulated with a 16 bit value present on the input port. This option can also be used to generate the in-phase and quadrature components from an incoming signal. This l/Q split function is required by systems which employ complex signal processing.