v 20110115 2 C 2800 1500 1 270 1 capacitor-1.sym { T 3100 2100 5 10 1 1 0 0 1 refdes=C1 T 3100 1700 5 10 1 1 0 0 1 value=1.0n } C 1900 2300 1 0 0 resistor-2.sym { T 2250 2600 5 10 1 1 0 0 1 refdes=R1 T 2200 2100 5 10 1 1 0 0 1 value=10k } N 2800 2400 3000 2400 4 { T 3000 2500 5 10 1 1 0 0 1 netname=Vout } N 1900 2400 1700 2400 4 C 2300 1200 1 0 0 gnd-1.sym N 1700 1500 3000 1500 4 T 2300 3050 9 10 1 0 0 4 1 Last Updated : 27/09/2011 T 900 200 9 10 1 0 0 0 4 The half power (3dB) point : - Calculated = 1/6.28RC = 15.92 KHz - NG-Spice = 15.92 KHz - GNU-Cap = 15.92 KHz C 1900 1500 1 90 0 voltage-1.sym { T 1400 1600 5 10 0 0 90 0 1 device=VOLTAGE_SOURCE T 1400 2000 5 10 1 1 180 0 1 refdes=Vin } T 2350 3300 9 14 1 0 0 4 1 Single Pole Passive RC Phase Shifter