Pulse generating circuit

Claim 2

In a pulse generating system, the combination of: an amplifier adapted to receive a series of negative pulses followed by a series of positive pulses, said amplifier being adapted to amplify equally pulses of both polarities; a pair of monostable multivibrators; a circuit for applying the output of said amplifier to one of said multivibrators, so that said one multivibrator receives only pulses of positive polarity; means for applying the output of said amplifier to the other of said multivibrators so that such other multivibrator receives only pulses of negative polarity and develops pulses of both polarities in response thereto; a pair of timing circuits; means for applying the positive pulse output of said other multivibrator to one of said timing circuits; means for applying the negative pulse output of said other multivibrator to the remaining one of said circuits; a gating network; means for combining the respective outputs of said timing circuits and applying such combined outputs to said gating network; means for applying the output of said one multivibrator to said gating network; and a utilization circuit receiving the output of said gating network and energized only when said gating network is open.

Claim 3

A fire-control circuit adapted to receive both a series of negative-going pulses and a series of positive-going pulses, the former being employed to set the circuit for subsequent operation and the latter being employed to generate a firing pulse in the event that said second-mentioned series of pulses arrives within a predetermined period of time following the last one of said first-mentioned series of pulses, said circuit including: an amplifier to which is applied a series of set input pulses of negative polarity followed by a second series of fire input pulses of positive polarity, said amplifier acting to amplify equally well pulses of both polarities; a pair of monostable multivibrators, one such multivibrator being of a set character and the other said multivibrators being of a fire character; means for applying the negative pulse output of said amplifier to said set multivibrator; means for applying the positive pulse output of said amplifier to said fire multivibrator; a ''''set time'''' network; circuit means for applying the negative pulse output of said set multivibrator to said set time network; a ''''fire delay'''' network; means for applying the positive pulse output of said set multivibrator to said fire delay network; a gating circuit; means for combining the respective outputs of said set time and said fire delay networks and applying such combined outputs to said gating circuit; means for applying the output of said ''''fire'''' multivibrator to said gating circuit together with the combined outputs of said set time and said fire delay networks; a firing circuit adapted to develop an output firing pulse; and a connection frOm said gating circuit to said firing circuit so that the latter is energized when said gating circuit is open.

Claim 4

A fire-control circuit adapted to receive both a series of negative-going pulses and a series of positive-going pulses, the former being employed to set the circuit for subsequent operation and the latter being employed to generate a firing pulse in the event that said second-mentioned series of pulses arrives within a predetermined period of time following the last one of said first-mentioned series of pulses, said circuit including: an amplifier to which is applied a series of set input pulses of negative polarity followed by a second series of fire input pulses of positive polarity, said amplifier acting to amplify equally well pulses of both polarities; a pair of monostable multivibrators, one such multivibrator being of a set character and the other said multivibrators being of a fire character; means for applying the negative pulse output of said amplifier to said set multivibrator; means for applying the positive pulse output of said amplifier to said fire multivibrator; a ''''set time'''' network; circuit means for applying the negative pulse output of said set multivibrator to said set time network; a ''''fire delay'''' network; means for applying the positive pulse output of said set multivibrator to said fire delay network; a gating circuit; means for combining the respective outputs of said set time and said fire delay networks and applying such combined outputs to said gating circuit; means for applying the output of said ''''fire'''' multivibrator to said gating circuit together with the combined outputs of said set time and said fire delay networks; a firing circuit adapted to develop an output firing pulse; and a connection frOm said gating circuit to said firing circuit so that the latter is energized when said gating circuit is open.

Claim 5

The combination of claim 2, in which said set time network includes a pair of transistors one of which is normally non-conductive and which is rendered conductive by the reception thereby of pulses of negative polarity from said set multivibrator, said set time network also including an energy-storage device on which a charge is developed during the period when said one transistor is cut off, said charge being reduced upon conduction of said one transistor, and means for applying the charge on said energy-storage device to the remaining transistor of said pair to control the conduction of such remaining transistor.

Claim 6

The combination of claim 3 in which said gating circuit includes a further transistor to which is applied the charge developed on said one transistor of said set time network.

Claim 7

The combination of claim 4 in which the combined outputs of said set time and said fire delay networks are applied to the said further transistor included in said gating circuit so as to render said further transistor conductive whenever said combined outputs exceed a predetermined value.

Claim 8

The combination of claim 5, in which said gating circuit includes a silicon-controlled rectifier associated with said further transistor, said silicon-controlled rectifier being rendered non-conductive by the conduction of said further transistor, a further energy-storage device and means for connecting said further energy-storage device to said firing circuit, said silicon-controlled rectifier being rendered conductive by reception of positive pulses from said fire multivibrator in the event that said further transistor is non-conductive to discharge said further energy-storage device and energize said firing circuit.