US 11,750,164 B2
Controlled rail-voltage decay for boost power supply output protection
Jeffrey Michael Brockmole, Brighton, MI (US); and Matthew Ryan Parnell, Livonia, MI (US)
Assigned to Harman International Industries, Incorporated, Stamford, CT (US)
Filed by Harman International Industries, Incorporated, Stamford, CT (US)
Filed on Nov. 17, 2020, as Appl. No. 16/950,685.
Prior Publication US 2022/0158598 A1, May 19, 2022
Int. Cl. H03F 1/02 (2006.01); H03G 3/30 (2006.01); H03F 3/183 (2006.01); H03G 5/00 (2006.01)
CPC H03G 3/301 (2013.01) [H03F 1/0211 (2013.01); H03F 3/183 (2013.01); H03G 5/005 (2013.01); H03F 2200/03 (2013.01); H03G 2201/103 (2013.01)] 17 Claims
OG exemplary drawing
 
14. A system for maintaining a boosted rail voltage corresponding with an audio amplifier, comprising:
a first hardware circuitry operable to control a rail voltage of an audio amplifier output stage; and
a second hardware circuitry operable to calculate frames of data for use in controlling the rail voltage, the frames of data including sets of data values and accompanying headers,
wherein the first hardware circuitry is operable to receive the frames of data from the second hardware circuitry;
wherein the first hardware circuitry is operable to set the rail voltage in accordance with the frames of data based upon determining that reception of the frames of data is uninterrupted;
wherein the first hardware circuitry is operable to adjust the rail voltage to a non-boosted voltage based upon determining that reception of the frames of data has been interrupted;
wherein the first hardware circuitry is operable to set a validation flag upon receipt of a frame of data;
wherein the first hardware circuitry is operable to clear the validation flag upon validating the frame of data; and
wherein reception of the sets of data values and accompanying headers is determined to be interrupted if an amount of time since a most-recent clearing of the validation flag exceeds a predetermined amount of time.