Long-Term Memory, Simulated Qubits, Physical Qubits - Brain Theory from a Circuits and Systems Perspective - page 64

Fig. 4.5 Diagram of a simulated qubit

Fig. 4.6 Waveform with 50
% duty cycle

be related to true. It can be arranged so that the output is false with 100 %
probability when at f 0 and true with 100 % probability when at f 1 . Note that as a
limit, f 0 ¼ 0 is possible merely by opening the feedback loop through Delay A.

In general, frequency and duty cycle may be changed by adjusting Delay A.
This is a neural multivibrator since pulses operate between a high and a low voltage
level, and deliver a rectangular-shaped wave with a given duty cycle.
Duty cycle is a term that measures the separation of the same-sized pulses.
Fifty percent duty cycle means that the pulses form a square wave such that pulse
separation equals pulse width. The highest frequency f 1 for a recursive neuron is
defined to have approximately 50 % duty cycle, shown in Fig. 4.6 . This waveform is
suggested to have the highest possible frequency because after a pulse, the neuron
must recover sufficiently before another pulse is permitted.

Probability Formulations

Probabilities may be formulated by assuming a sampling pulse that approaches an
impulse, one whose width is much less than τ . A lowest multivibrator frequency

may be specified to be f 0 1/f 0 . The highest frequency

may be specified to be f 1 with a period of 2τ. An intermediate frequency is specified
to be f x with a period of T x ¼

0 with a period of T o ¼

1/f x . Over several cycles, the ratio T o /T x equals the
average number of cycles that f x can deliver in time T o .Iff x is a harmonic, say nf 0 ,