US 12,396,367 B2
Driver circuitry comprising active inductor circuitry for piezoelectric transducers
John P. Lesso, Edinburgh (GB)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Oct. 13, 2023, as Appl. No. 18/486,609.
Application 18/486,609 is a continuation of application No. 17/075,255, filed on Oct. 20, 2020, granted, now 11,832,523.
Prior Publication US 2024/0074319 A1, Feb. 29, 2024
Int. Cl. H01L 41/04 (2006.01); H01L 41/107 (2006.01); H10N 30/40 (2023.01); H10N 30/80 (2023.01)
CPC H10N 30/804 (2023.02) [H10N 30/40 (2023.02)] 20 Claims
OG exemplary drawing
 
1. Circuitry for driving a piezoelectric transducer, the circuitry comprising:
a driver circuitry configured to supply a drive signal to cause the piezoelectric transducer to generate an output signal; and
an active inductor circuitry configured to be coupled with the piezoelectric transducer, wherein the active inductor circuitry is tuneable to adjust a frequency characteristic of the output signal;
wherein the circuitry is configured such that, in use of the circuitry, the active inductor circuitry is coupled in series with the piezoelectric transducer.