Signal conditioning circuit

Claim 2

A signal pulse conditioning circuit, comprising: a two stage feedback amplifier, a switch connected between the output of the first stage and the input of the second stage of said two stage amplifier; means, responsive to the voltage level at the feedback summing junction of said two stage amplifier, for closing said switch when the summing junction voltage exceeds a predetermined value; said means for closing said switch, including means for closing the switch when the voltage level at the summing junction exceeds a predetermined positive level and a second means for closing the switch when the voltage level at the summing junction exceeds a predetermined negative level; means for delaying the closing of the switch, the first time the signal exceeds the predetermined negative level until a predetermined time after the voltage level, at the summing junction, exceeds a second more negative voltage level; said two stage amplifier including means, for holding the voltage in the output of the second stage at the level that exists when the switch is opened, until the switch is again closed; and means for providing an output signal at the level of the output voltage of said second stage when the voltage level at the summing junction exceeds the second more negative voltage level.

Claim 3

A signal pulse conditioning circuit, comprising: a two stage feedback amplifier, a switch connected between the output of the first stage and the input of the second stage of said two stage amplifier; means, responsive to the voltage level at the feedback summing junction of said two stage amplifier, for closing said switch when the summing junction voltage exceeds a predetermined value; said two stage amplifier including means, for holding the voltage in the output of the second stage at the level that exists when the switch is opened, until the switch is again closed; said means for closing said switch including a first comparator circuit; a second comparator circuit and a third comparator circuit; a monostable multivibrator connected to the output of the first of said comparator circuits; a nor-gate flip-flop circuit; said nor-gate flip-flop circuit having one nor-gate connected to the output of the second of said comparator circuits and a second nor-gate connected to a first output of said multivibrator; means, in the circuit between the monostable multivibrator and said second nor-gate for delaying the operation of the second nor-gate until the end of the monostable multivibrator output pulse; means, responsive to a second output from said monostable multivibrator circuit for providing an output signal at the level of the output voltage of said second stage of the two stage amplifier at the time of the monostable multivibrator output pulse.

Claim 4

A signal pulse conditioning circuit, comprising: a two stage feedback amplifier, a switch connected between the output of the first stage and the input of the second stage of said two stage amplifier; means, responsive to the voltage level at the feedback summing junction of said two stage amplifier, for closing said switch when the summing junction voltage exceeds a predetermined value; said two stage amplifier including means, for holding the voltage in the output of the second stage at the level that exists when the switch is opened, until the switch is again closed; said means for closing said switch including a first comparator circuit; a second comparator circuit and a third comparator circuit; a monostable multivibrator connected to the output of the first of said comparator circuits; a nor-gate flip-flop circuit; said nor-gate flip-flop circuit having one nor-gate connected to the output of the second of said comparator circuits and a second nor-gate connected to a first output of said multivibrator; means, in the circuit between the monostable multivibrator and said second nor-gate for delaying the operation of the second nor-gate until the end of the monostable multivibrator output pulse; means, responsive to a second output from said monostable multivibrator circuit for providing an output signal at the level of the output voltage of said second stage of the two stage amplifier at the time of the monostable multivibrator output pulse.

Claim 5

The device as recited in claim 2 wherein said means for providing an output signal at the level of the output voltage of said second stage of the two stage amplifier at the time of monostable multivibrator output pulse includes a double emitter Planar transistor having one emitter connected to the output of the two stage amplifier with an output connected to the second emitter.