The present invention discloses a contact type of pulse measurement device, which
comprises a first active sensor electrode and a second active sensor electrode
having corresponding opposite polarities with each other; and the two active sensor
electrodes respectively connected to the pulse measurement device by conductive
wires and the pulse measurement device comprises a negative feedback difference
common mode signal and a buffer/balanced circuit for providing a circuit with a
self common point electrode potential. Therefore, the first bio-potential signal
can be detected by means of the first active sensor electrode and the common point
electrode. Similarly, a second bio-potential signal having the same magnitude but
a different phase as the first bio-potential signal can be detected by the second
active sensor electrode and the common point electrode.