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.PS
# `bistable.m4'
cct_init # Default initialization
up_
rgbdraw(1,0,0,
Q1: bi_tr(,R) # Q1 upward with base to the right
llabel(,Q_1) ) # Label to left of last []
rgbdraw(0,0,1,
Q2: bi_tr with .C at Q1.C+(elen_*7/4,0) # Q2 with base to left
rlabel(,Q_2) )
ground(at Q1.E)
ground(at Q2.E)
line right_ dimen_/3 from Q1.B # Extend the base conductors
B1: Here
line left_ dimen_/3 from Q2.B
B2: Here
resistor(up_ elen_*0.75 from Q1.C); llabel(,"$R_L$" wid 0.16) #Load resistors
line to (Q2.C,Here) "$V_{\hbox{cc}}$" below
resistor(down_ to Q2.C); llabel(,R_L)
move to Q1.C+(0,dimen_/5)
{ resistor(right_ to (B1,Here)); llabel(,R_1)
X: line to B2 } # Label the line to be jumped
resistor(from (Q2.C,Here) left_ to (B2,Here)); rlabel(,R_1)
crossover(to B1,R,X)
resistor(down_ elen_*0.75); rlabel(,R_2) # Bias resistors
{"$-V_{\hbox{cc}}$" rjust}
line to (B2,Here)
resistor(up_ to B2); rlabel(,R_2)
.PE
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