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"""
Hyperrealistic voltage-based flip-flops: SR, D, JK, and T.
Each flip-flop is built from voltage-based logic gates and simulates real-world behavior.
"""
from logic_gates import NANDGate, ANDGate, ORGate, NOTGate, VDD, VSS, VTH, GATE_DELAY
import time
class SRFlipFlop:
"""Set-Reset flip-flop using cross-coupled NAND gates."""
def __init__(self):
self.nand1 = NANDGate()
self.nand2 = NANDGate()
self.q = VSS
self.q_bar = VDD
def update(self, s, r):
# s, r are voltages
# Cross-coupled NANDs
q_new = self.nand1.output(s, self.q_bar)
q_bar_new = self.nand2.output(r, q_new)
self.q = q_new
self.q_bar = q_bar_new
return self.q, self.q_bar
class DFlipFlop:
"""D (Data) flip-flop using SR flip-flop and NOT gate."""
def __init__(self):
self.sr = SRFlipFlop()
self.notg = NOTGate()
def update(self, d, clk):
# d, clk are voltages
s = self.nand(d, clk)
r = self.nand(self.notg.output(d), clk)
return self.sr.update(s, r)
def nand(self, a, b):
return NANDGate().output(a, b)
class JKFlipFlop:
"""JK flip-flop using NAND gates."""
def __init__(self):
self.q = VSS
self.q_bar = VDD
self.nand1 = NANDGate()
self.nand2 = NANDGate()
self.nand3 = NANDGate()
self.nand4 = NANDGate()
def update(self, j, k, clk):
# j, k, clk are voltages
j_in = self.nand1.output(j, clk, self.q_bar)
k_in = self.nand2.output(k, clk, self.q)
q_new = self.nand3.output(j_in, self.q_bar)
q_bar_new = self.nand4.output(k_in, q_new)
self.q = q_new
self.q_bar = q_bar_new
return self.q, self.q_bar
class TFlipFlop:
"""T (Toggle) flip-flop using JK flip-flop."""
def __init__(self):
self.jk = JKFlipFlop()
def update(self, t, clk):
# t, clk are voltages
return self.jk.update(t, t, clk)
# Example usage
if __name__ == "__main__":
print("SR Flip-Flop:")
sr = SRFlipFlop()
print("Set:", sr.update(VDD, VSS))
print("Reset:", sr.update(VSS, VDD))
print("Hold:", sr.update(VSS, VSS))
print("\nD Flip-Flop:")
dff = DFlipFlop()
print("D=1, CLK=1:", dff.update(VDD, VDD))
print("D=0, CLK=1:", dff.update(VSS, VDD))
print("\nJK Flip-Flop:")
jk = JKFlipFlop()
print("J=1, K=0, CLK=1:", jk.update(VDD, VSS, VDD))
print("J=0, K=1, CLK=1:", jk.update(VSS, VDD, VDD))
print("J=1, K=1, CLK=1 (toggle):", jk.update(VDD, VDD, VDD))
print("\nT Flip-Flop:")
tff = TFlipFlop()
print("T=1, CLK=1 (toggle):", tff.update(VDD, VDD))
print("T=0, CLK=1 (hold):", tff.update(VSS, VDD))
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