Digital function generator
Signal processing apparatus
Method of and apparatus for composing approximate sinusoidal waveform
Function generator with storage matrix Patent #: 4225936
ApplicationNo. 06/166237 filed on 07/07/1980
US Classes:708/272Memory used to store waveshape
ExaminersPrimary: Malzahn, David H.
Attorney, Agent or Firm
International ClassesG10H 7/08 (20060101)
G10H 7/10 (20060101)
AbstractA waveform generator for an electronic musical instrument comprises a signal generator (10) developing a binary signal sequentially increasing and decreasing in value at a selected rate and a memory (26) storing a plurality of parameter instructions at respective memory addresses, each memory address corresponding to a continuous group of values of the binary signal. An addressing circuit (24) addresses each memory address in response to the binary signal assuming a value within the group of values corresponding thereto. The binary signal is processed with the addressed parameter instructions in an arithmetic circuit (22,40) for developing a linear piecewise approximation of a desired waveform signal.