Paired transition rebalancing pulse for voltage to frequency converters

Claim 1

An analog to digital converter comprising: an integrating circuit, means for applying an analog signal to said integrating circuit; a comparator coupled to said integrator for developing a control signal when the amplitude of the output signal from said integrator exceeds a predetermined level; a source of pulses, an output terminal, means for selectively coupling said source of pulses to said output terminal upon development of said control signal, circuit means including a current source coupled to said integrating circuit and to said selective coupling means, and logic means coupled to said comparator and to said source of pulses for actuating said current source to apply rebalance current pulses to said integrator circuit wherein said rebalance current pulse opposes current applied to said integrator due to said applied analog signal, each rebalance current pulse having positive and negative polarity components, said positive component being unequal in time duration to said negative component thereby providing a net rebalance current flow to or from said integrator, whereby the number of pulses produced at the said output terminal are directly proportioned to the input analog signal applied to the said integrator circuit.