ENERGY AMPLIFYING SELECTOR GATE FOR BASE-BAND SIGNALS

• US 3,750,025 A
• Filed: 04/26/1971
• Issued: 07/31/1973
• Est. Priority Date: 04/26/1971
• Status: Expired due to Term

• Current Assignee: Gerald F. Ross
• Original Assignee: Gerald F. Ross
• Inventors: Ross, Gerald F.
• Primary Examiner(s): Borchelt, Benjamin A.
• Assistant Examiner(s): Montone, G. E.
• Application Number:
  US05/137,355
• Time in Patent Office: 827 Days
• Field of Search: 343/5R,17.1 325/322,323,325,129
• US Class Current: 375/256
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband

Abstract

Energy amplifying timed selector or gating circuits for sampling base-band signals, such as directively transmitted signals reflected from objects, include a dispersionless, broad band transmission line system cooperating with a biased semi-conductor receiver-detector located in the transmission line system for instantaneously gating and detecting substantially the total energy of base-band signals and for providing corresponding time selected or gated outputs suitable for indication of the presence of such gated pulses.

Claims

1. Base-band signal selector means comprising:

wide band transmission line means for propagating electromagnetic pulse signals in the TEM tranSmission mode substantially without distortion thereof, transistor means having base, collector, and emitter means, first circuit means responsive to said transmission line means for supplying said pulse signal to said base means substantially without distortion thereof, second circuit means connected to said collector means for biasing said transistor means near conduction, third circuit means connected to said emitter means for applying a selective gating signal for causing said transistor means to conduct in the presence of said selectively gated pulse signal, and output means connected to said collector means for supplying a time extended output pulse corresponding to said selectively gated pulse signal in the presence of said selective gating signal.

2. Base-band signal selector means comprising:

wide band transmission line means for propagating electromagnetic pulse signals in the TEM transmission mode substantially without distortion thereof, transistor means having base, collector, and emitter means, first circuit means responsive to said transmission line means for supplying said pulse signal to said base means substantially without distortion thereof, second circuit means connected to said collector means for biasing said transistor means near conduction, said second circuit means including;

field effect transistor means having source, drain, and gate electrode means, first impedance means, and first voltage source means, said first voltage source means being connected to said drain electrode means, said source electrode means being connected through said first impedance means to said collector means, and said gate electrode means being connected to said collector means, third circuit means connected to said emitter means for applying a gating signal for causing said transistor means to conduct in the presence of said pulse signal, and output means connected to said collector means for supplying a time extended output pulse corresponding to said pulse signal in the presence of said gating signal.

3. Apparatus as described in claim 2 further including second impedance means connected between said emitter means and said first voltage source means.

4. Apparatus as described in claim 3 wherein said third circuit means comprises:

synchronizer means for providing timing pulses, and means for generating said gating signal in response to said synchronizer timing pulses.

5. Apparatus as described in claim 4 wherein said means for generating said gating signal comprises:

timing pulse delay means, and circuit means responsive to said pulse delay means for forming gating pulses of longer duration than said timing pulses.

6. Apparatus as described in claim 5 wherein said circuit means for forming gating pulses includes filter means for removing undesired transients from said gating pulses.

7. Apparatus as described in claim 6 wherein said circuit for forming gating pulses includes signal inverter means for inverting said gating pulses.

8. Apparatus as described in claim 4 wherein said wide band transmission line means comprises dual conductor transmission line means having a substantially constant characteristic impedance and a substantially dispersionless characteristic.

9. Apparatus as described in claim 8 wherein said dual conductor transmission line means comprises antenna means having first and second planar conductor means with opposed major conducting surface means.

10. Apparatus as described in claim 8 wherein said transistor means is coupled in energy exchanging relation across said dual conductor transmission line means.

11. Apparatus as described in claim 4 comprising base-band transmitter means responsive to said timing pulses for providing said pulse signals.