* Spectral Encoder Circuit Simulation
* Implements spectral encoding theory in analog circuit form
* Based on Signal Theory Compendium spectral encoding theory
*
* Core concepts:
* - Spectral signature: 8-bin amplitude vector
* - Genetic event mapping to spectral peaks
* - Spectral overlap and accumulation

.title Spectral Encoder Analog Circuit Simulation

* Input signals for genetic events (A, T, G, C)
* Each event maps to a specific spectral bin
VA_IN 2 0 PULSE(0 3.3 1n 1n 10n 20n 100n)
VT_IN 3 0 PULSE(0 3.3 21n 1n 10n 20n 100n)
VG_IN 4 0 PULSE(0 3.3 41n 1n 10n 20n 100n)
VC_IN 5 0 PULSE(0 3.3 61n 1n 10n 20n 100n)

* Spectral bin circuits (8 bins total)
* Each bin is an RC integrator that accumulates charge

* Bin 0 (Event A)
R_BIN0 10 0 10k
C_BIN0 10 0 10p
E_BIN0 2 0 10 0 1  ; Voltage-controlled voltage source for event A

* Bin 1 (Event T)
R_BIN1 11 0 10k
C_BIN1 11 0 10p
E_BIN1 3 0 11 0 1  ; Voltage-controlled voltage source for event T

* Bin 2 (Event G)
R_BIN2 12 0 10k
C_BIN2 12 0 10p
E_BIN2 4 0 12 0 1  ; Voltage-controlled voltage source for event G

* Bin 3 (Event C)
R_BIN3 13 0 10k
C_BIN3 13 0 10p
E_BIN3 5 0 13 0 1  ; Voltage-controlled voltage source for event C

* Remaining bins (4-7) - initially empty
R_BIN4 14 0 10k
C_BIN4 14 0 10p

R_BIN5 15 0 10k
C_BIN5 15 0 10p

R_BIN6 16 0 10k
C_BIN6 16 0 10p

R_BIN7 17 0 10k
C_BIN7 17 0 10p

* Spectral overlap circuit (summing amplifier)
* Computes inner product of spectral signatures
R_SUM1 18 0 10k
R_SUM2 19 0 10k
R_SUM3 20 0 10k
R_SUM4 21 0 10k
E_SUM1 10 0 18 0 0.125
E_SUM2 11 0 19 0 0.125
E_SUM3 12 0 20 0 0.125
E_SUM4 13 0 21 0 0.125

R_SUM_OUT 22 0 2.5k
E_SUM_OUT 18 21 22 0 1

* Output buffers for spectral bins
E_OUT0 10 0 30 0 1
E_OUT1 11 0 31 0 1
E_OUT2 12 0 32 0 1
E_OUT3 13 0 33 0 1
E_OUT4 14 0 34 0 1
E_OUT5 15 0 35 0 1
E_OUT6 16 0 36 0 1
E_OUT7 17 0 37 0 1

* Analysis
.TRAN 1n 200n
.PLOT TRAN V(2) V(3) V(4) V(5) V(30) V(31) V(32) V(33) V(22)

* Measurement commands
.MEASURE TRAN bin0_peak MAX V(30)
.MEASURE TRAN bin1_peak MAX V(31)
.MEASURE TRAN bin2_peak MAX V(32)
.MEASURE TRAN bin3_peak MAX V(33)

.END