diff_amp_cm
Project Library Model Name Kind
ISCD_IADC analog_blocks diff_amp_cm Hierarchical Module

Parameters

Name Type Default Description
gain double 1.0 DC gain of amplifier [V/V]
r_div double 10e3 CM divider resistor [Ohm]
fc double 1e6 corner frequency [Hz]
offset double 1e-3 input offset [V]

Ports

Name Interface Type Description
vdd sca_eln::sca_terminal positive supply (for common mode)
inp sca_eln::sca_terminal differential input ("plus")
inn sca_eln::sca_terminal differential input ("minus")
vss sca_eln::sca_terminal negative supply (for common mode)
outn sca_eln::sca_terminal differential output ("minus")
vcm sca_eln::sca_terminal common-mode output
outp sca_eln::sca_terminal differential output ("plus")

Description

differential common-mode amplifier

Long Description

Inverting differential amplifier with resistive common mode and limited bandwidth (1.O. butterworth).

Schematic

we need the dummies because of a bug in the VCVS implementation. Differential amplifier with resistive common mode. ncp ncn np nn gain_n value = p.gain ncp ncn np nn gain_p value = p.gain outn outp inp inn vcm p n r_dummy1 value = 0.0 gain = 1.0 r_div = 10e3 p n r_dummy2 value = 0.0 ncp ncn np nn diff_p value = 1.0/1e3 ncp ncn np nn diff_n value = 1.0/1e3 value = 1e3 value = 1.0/(2*M_PI*1e3*p.fc) value = 1e3 value = 1.0/(2*M_PI*1e3*p.fc) fc = 1e6 p n r_outn value = 100.0 p n r_outp value = 100.0 offset = 1e-3 this stage is inverting ! Carinthia University of Applied Science Author: W. Scherr, Date: JAN 2021 scrollfixer scrollfixer vcm_xx vcm_x vn_lp vp_lp op on inp_off