Abstract A trigger circuit including first and second input leads, wherein two switches are connected in parallel between the leads. A regenerative amplifier is connected from the leads. The first lead is connected to a first junction. A D.C. source of potential and a first resistor are provided, as well. The first resistor is connected from the first junction to the source. A second junction and a second resistor are also provided. The second resistor is connected from the source to the second junction. The second lead is connected to a point of reference potential. A third resistor is connected from the third junction to the point. A regenerative amplifier includes a differential amplifier having inverting and noninverting inputs and an output. A positive feedback resistor is connected between the noninverting input and the output. The second junction is connected to the noninverting input. Means are provided that connect the first junction to the inverting input. The regenerative amplifier has hysteresis which prevent a double pulse output in the event of a double pulse input. That is, only one pulse out is allowed even though two short and closely spaced pulses are provided at the input of the regenerative amplifier. This arrangement prevents inaccurate pulse counting in a ball prover or the like.
A trigger circuit comprising: first and second Input leads; two switches connected in parallel between said leads; and a regenerative amplifier connected from said leads, said first lead being connected to a first junction, a D. C. source of potential, a first resistor connected from said first junction to said source, a second junction, a second resistor connected from said source to said second junction, said second lead being connected to a point of reference potential, a third resistor connected from said second junctionn to said point of reference potential, said regenerative amplifier including a differential amplifier having inverting and noninverting inputs and an output, a fourth positive feedback resistor connected between said noninverting input and said output, said second junction being connected to said noninverting input, and means connecting said first junction to said inverting input.
Claim 2
Dependent Claim
137 words
A trigger circuit comprising: first and second Input leads; two switches connected in parallel between said leads; and a regenerative amplifier connected from said leads, said first lead being connected to a first junction, a D. C. source of potential, a first resistor connected from said first junction to said source, a second junction, a second resistor connected from said source to said second junction, said second lead being connected to a point of reference potential, a third resistor connected from said second junctionn to said point of reference potential, said regenerative amplifier including a differential amplifier having inverting and noninverting inputs and an output, a fourth positive feedback resistor connected between said noninverting input and said output, said second junction being connected to said noninverting input, and means connecting said first junction to said inverting input.
Claim 3
Dependent Claim
13 words
The invention as defined in claim 1, wherein said means includes a resistor.