Temperature stabilized monstable multivibrator

Claim 1

In a solid-state voltage-variable monostable multivibrator circuit of the type comprising: first and second transistor stages responsive to a bias voltage applied to said first stage for normally maintaining said first stage in a ''''OFF'''' condition and said second stage in an ''''ON'''' condition; said first stage being responsive to input trigger pulses of a predetermined polarity such that said first stage is caused to turn ''''ON'''' by receipt of one of such pulses; means for coupling said first stage to said second stage so that turning said first stage ''''ON'''' causes said second stage to turn ''''OFF'''' for a predetermined time period; said time period being a determinable function of the bias voltage applied to said first stage transistor; the improvement comprising means for stabilizing said time period and comprising; a voltage divider comprising a constant resistance and the variable resistance developed between the emitter and collector of a third transistor serially connected with a source of voltage, said third transistor being arranged to accept pulses as an input to its base, and the series connection between said constant resistance and said third transistor being connected to provide the base of said first stage transistor with biasing voltage, and with input trigger pulses; and said third transistor being selected to vary its resistance in response to temperature changes and in a manner related to the change in parameters of said first stage transistor with temperature, whereby to provide a biasing voltage as a function of temperature and stabilize said time period.