Waveform control circuit
OwnerPeter Hiscocksinventor
Life of this patent
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Abstract
The waveform conform control circuit includes a waveform generator, an amplitude adjustment device and an offset device. The waveform generator produces a current waveform. The amplitude adjustment device receives amplitudes amplitude data and produces a predetermined scale factor which is applied to the basic current waveform to produce a scaled current waveform. The offset device is a digital to analog converter for receiving offset data and producing a predetermined scale value that is added to the scaled waveform to produce a final current waveform. A method a digitally generated waveform is also disclosed. An offset circuit using current steering digital to analog and a current mirror is also disclosed.
Claims23
A method of controlling a digitally generated waveform comprising the steps of:
- receiving waveform data into a first digital to analog converter to produce a basic current waveform;
- receiving amplitude data into a second digital to analog converter to produce a predetermined scale factor which is applied to the basic current waveform to produce a scaled current waveform;
- receiving offset data into a third digital to analog converter to produce a predetermined scale value that is added to the scaled current waveform to produce a final current waveform.
A device for controlling a digitally generated waveform comprising;
- a means for producing a basic current waveform;
- a means for receiving amplitude data and producing a predetermined scale factor which is applied to the basic current waveform to produce a scaled current waveform;
- an offset digital to analog converter for receiving offset data and producing a predetermined scale value that is added to the scaled current waveform to produce a final current waveform.
A circuit for offsetting a waveform comprising:
- a means for generating a current waveform and a complementary current waveform;
- a current steering digital to analog converter having complementary current output terminals;
- a current mirror wherein the complementary current output terminals of the current steering digital to analog converter are operably connected to the current mirror through the current waveform and the complementary current waveform to produce an offset current waveform.
Dependencies are inferred from the claim text.