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![Circuit having high-pass filter with variable corner frequency Patent Grant Chou , et al. June 1, 2 [MEDIATEK INC.]](https://uspto.report/patent/grant/11025204/US11025204-20210601-D00000.png "Circuit having high-pass filter with variable corner frequency Patent Grant Chou , et al. June 1, 2 [MEDIATEK INC.]")
Circuit having high-pass filter with variable corner frequency Patent Grant Chou , et al. June 1, 2 [MEDIATEK INC.]
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Simple Variable High Pass Filter – Improvements : r/synthdiy
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