di2490l1.txt
;*********************************************************************************************
; LISTING 1 - HALF-BRIDGE DRIVER IN ISSPICE4
;
; "Delay line eases Spice dead-time generation," EDN, March 2, 2000, pg 118
;
; http://www.ednmag.com/ednmag/reg/2000/030200/designideas.htm#05di3
;****************************************************************************************************

.SUBCKT NEWDT CLK GU SU QL {DT=500N VHIGH=10V VLOW=100M RS=10}
* Clock_In GateUpper SourceUpper GateLower
*
* DT: Dead time in seconds
* VHIGH: Output level when high
* VLOW: Output level when low
* RS: Driver's output resistance
*
BU1 1 0 V=(V(CLK)>800M) & (V(TD1)>800M) ? {VHIGH} : {VLOW}
BU2 4 SU V=V(1)
RSU 4 GU {RS}
RFLO SU 0 1G
BL 2 0 V=(V(CLKB)>800M) & (V(TD2)>800M) ? {VHIGH} : {VLOW}
RSL 2 QL {RS}
X1 CLK TD1 UTD PARAMS: TD=DT
X2 CLKB TD2 UTD PARAMS: TD=DT
X3 CLK CLKB INV
.ENDS
*INCLUDE DEAD.LIB
**********
.SUBCKT UTD 1 2 {TD=???}
*
*Parameters K=GAIN TD=DELAY
RIN 1 0 1E15
E1 3 0 1 0 1
T1 3 0 2 0 Z0=1 TD={TD}
R1 2 0 1
.ENDS
**** 1 INPUT INVERTER ****
.SUBCKT INV 1 2
B1 4 0 V= V(1)>800M ? 0 : 5V
RD 4 2 100
CD 2 0 10P
.ENDS INV