US 12,155,359 B2
Driver circuit arrangement for driving load and differential drive arrangement thereof
Bernardus Henricus Krabbenborg, Nijmegen (NL); Lutsen Dooper, Nijmegen (NL); and Han Martijn Schuurmans, Nijmegen (NL)
Assigned to SHENZHEN GOODIX TECHNOLOGY CO., LTD., (CN)
Filed by SHENZHEN GOODIX TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed on Sep. 8, 2021, as Appl. No. 17/469,552.
Claims priority of application No. 20195205 (EP), filed on Sep. 9, 2020.
Prior Publication US 2022/0077833 A1, Mar. 10, 2022
Int. Cl. H01L 41/02 (2006.01); H03F 1/08 (2006.01); H03G 1/00 (2006.01); H04R 17/00 (2006.01)
CPC H03G 1/0029 (2013.01) [H03F 1/086 (2013.01); H04R 17/00 (2013.01); H03F 2200/03 (2013.01); H04R 2499/11 (2013.01); H04R 2499/15 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A driver circuit arrangement for driving a load, comprising
an amplifier with an amplifier input and an amplifier output, wherein in operation an input signal is provided to the amplifier input, and the amplifier output is connected to the load, the load being a capacitive load, and
a dual feedback configuration comprising a feedback resistor and a current sensor feedback arrangement,
the feedback resistor being connected between the amplifier output and the amplifier input and providing a voltage feedback path,
the current sensor feedback arrangement providing a current feedback path from the amplifier output to the amplifier input, and comprising:
a current sensor resistor connected in an output current path of the driver circuit arrangement, and
a current feedback amplifier with inputs connected to the current sensor resistor and an output connected to the amplifier input;
the current sensor resistor has a resistor value equal to REXT/N, wherein REXT is an output impedance value associated with a predetermined signal transfer function of the driver circuit arrangement, and N is an amplification factor of the current feedback amplifier.