Bipolar Chopper * CIRCUIT V1 1 2 SIN 0 0.5 10 V2 2 3 SIN 0 0.5 10 R1 4 5 500 R2 0 4 500 D1 1 5 Diode D2 3 0 Diode D3 5 3 Diode D4 0 1 Diode V3 2 4 SIN 0 10 200 * MODELS .MODEL Diode D * ANALYSIS .TRAN 0.0001 0.15 * VIEW RESULTS .PLOT TRAN V(5) .PROBE V(5) .END