US 12,488,075 B2
Biometric authentication device and fingerprint authentication device including the same
Kwang Il Oh, Daejeon (KR); Tae Wook Kang, Daejeon (KR); Seong-Eun Kim, Daejeon (KR); and Jae-Jin Lee, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed on Nov. 10, 2022, as Appl. No. 17/984,398.
Claims priority of application No. 10-2022-0000221 (KR), filed on Jan. 3, 2022.
Prior Publication US 2023/0214467 A1, Jul. 6, 2023
Int. Cl. G06F 21/32 (2013.01)
CPC G06F 21/32 (2013.01) 14 Claims
OG exemplary drawing
 
1. A biometric authentication device comprising:
a clock generator configured to generate a clock signal;
an authentication signal generator configured to generate an authentication signal based on the clock signal;
a transmission electrode configured to transmit the authentication signal to a contact body;
a reception electrode configured to receive a channel pass signal in which the authentication signal passes through a channel of the contact body; and
a biometric authenticator configured to restore the channel pass signal and to compare the restored channel pass signal with the authentication signal to generate a biometric authentication signal indicating whether the contact body is a biological tissue;
wherein the biometric authenticator includes:
an equalizer configured to restore the channel pass signal based on a tap weight reflecting a channel response characteristic of the biological tissue and to generate an equalizer output which is the restored channel pass signal, and
wherein the equalizer includes:
an adder configured to add the channel pass signal by outputs of first and second multipliers to output a corrected channel pass signal;
a comparator configured to compare the corrected channel pass signal with a reference voltage to output a comparison bit value; and
an inverter configured to output an inverted clock signal based on the clock signal.