2009-08-30 13:02:48 +02:00
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RC band pass example circuit
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* This netlist demonstrates the following:
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* global nodes (vdd, gnd)
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* .measure statements for delay and an example ternary operator
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* You can run the example circuit with this command:
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*
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* ngspice rc-meas-ac.sp
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* global nodes
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.global vdd gnd
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* autostop -- stop simulation early if .measure statements done
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*.option autostop
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vin in gnd dc 0 ac 1
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R1 in mid1 1k
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c1 mid1 gnd 1n
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C2 mid1 out 500p
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R2 out gnd 1k
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.ac DEC 10 1k 10MEG
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.meas ac vout_at FIND v(out) AT=1MEG
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2009-08-30 21:54:54 +02:00
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.meas ac vout_atr FIND vr(out) AT=1MEG
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.meas ac vout_ati FIND vi(out) AT=1MEG
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.meas ac vout_atm FIND vm(out) AT=1MEG
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.meas ac vout_atp FIND vp(out) AT=1MEG
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.meas ac vout_atd FIND vdb(out) AT=1MEG
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2009-08-30 13:02:48 +02:00
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.meas ac vout_max max v(out) from=1k to=10MEG
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.meas ac freq_at when v(out)=0.1
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.meas ac vout_diff trig v(out) val=0.1 rise=1 targ v(out) val=0.1 fall=1
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.meas ac fixed_diff trig AT = 10k targ v(out) val=0.1 rise=1
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.meas ac vout_avg avg v(out) from=10k to=1MEG
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.meas ac vout_integ integ v(out) from=20k to=500k
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.meas ac freq_at2 when v(out)=0.1 fall=LAST
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.meas ac bw_chk param='(vout_diff < 100k) ? 1 : 0'
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.meas ac bw_chk2 param='(vout_diff > 500k) ? 1 : 0'
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.meas ac vout_rms rms v(out) from=10 to=1G
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.control
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run
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*rusage all
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plot v(out)
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2009-08-30 21:54:54 +02:00
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plot ph(v(out))
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plot mag(v(out))
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plot db(v(out))
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2009-08-30 13:02:48 +02:00
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.endc
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.end
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