Signal translator with squelch

A signal translator, comprising

• a square wave translating device having an alternating current signal input for receiving alternating current signals and a square wave output for delivering square wave output signals corresponding to said alternating current signals,
• said translating device having a switching input for receiving a first control voltage for activating said translating device and a second control voltage for squelching said translating device,
• and squelch control voltage generating means for receiving said alternating current signals and producing said first control voltage when said alternating current signals exceed a predetermined threshold level while producing said second control voltage when said alternating current signals are less than said threshold level,
• said squelch control voltage generating means including control signal producing means for converting said alternating current signals into a corresponding control signal,
• and comparator means for receiving said control signal and producing said first control voltage when said control signal exceeds an established level while producing said second control voltage when said control signal is less than said established level,
• whereby said translating device is activated when said control signal exceeds the established level but is squelched when said control signal is less than the established level.

A signal translator, comprising

• a square wave generator including an operational amplifier having a tone signal input for receiving tone signals and a square wave output for delivering square wave output signals corresponding to said tone signals,
• said operational amplifier having a switching input for receiving a first control voltage for activating said amplifier and a second control voltage for squelching said amplifier,
• and squelch control voltage generating means for receiving said tone signals and producing said first control voltage when said tone signals exceed a predetermined level while producing said second control voltage when said tone signals are less than said predetermined level,
• said squelch control voltage generating means including rectifying means for producing a rectified direct current signal in response to said tone signals,
• integrating means for producing an integrated direct current signal in response to said rectified direct current signal,
• and comparator means for receiving said integrated direct current signal and producing said first control voltage when said integrated direct current signal exceeds an established level while producing said second control voltage when said integrated direct current signal is less than said established level.

A signal translator, comprising

• a square wave translating device having an alternating current signal input for receiving alternating current signals and a square wave output for delivering square wave output signals corresponding to said alternating current signals,
• said translating device having a switching input for receiving a first control voltage for activating said translating device and a second control voltage for squelching said translating device,
• squelch control voltage generating means for receiving said alternating current signals and producing said first control voltage when said alternating current signals exceed a predetermined threshold level while producing said second control voltage when said alternating current signals are less than said threshold level,
• said squelch control voltage generating means including rectifying means for producing a rectified direct current signal in response to said alternating current signals,
• integrating means for producing an integrated direct current signal in response to said rectified direct current signal,
• and comparator means for receiving said integrated direct current signal and producing said first control voltage when said integrated direct current signals exceed an established level while producing said second control voltage when said integrated direct current signal is less than said established level.