Driving Variable Capacitive Loads
AssigneeSweven Design Ltd.
InventorRobert William Gwynne
Life of this patent
Estimating the term…
Abstract
Circuitry for driving a variable capacitive load comprising: a variable capacitive load; a digital control circuit configured to generate a digital drive signal; and a drive circuit configured to convert the digital drive signal into an analogue drive signal, the analogue drive signal forming a drive waveform for charging the variable capacitive load, the drive circuit comprising a slewing circuit configured to drive a time dependent voltage component of the drive waveform; wherein the digital control circuit is configured to modify the digital drive signal for each charging cycle so as to match the time dependent voltage component of the drive waveform to the variable capacitive load.
Claims34
Circuitry for driving a variable capacitive load, the circuitry comprising:
- the variable capacitive load;
- a digital control circuit configured to generate a digital drive signal;
- and
- a drive circuit configured to convert the digital drive signal into an analogue drive signal, the analogue drive signal forming a drive waveform for charging the variable capacitive load, the drive circuit comprising a slewing circuit configured to drive a time dependent voltage component of the drive waveform;
- wherein the digital control circuit is configured to modify the digital drive signal for each charging cycle so as to match the time dependent voltage component of the drive waveform to the variable capacitive load.
Dependencies are inferred from the claim text.