IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0044821
(2005-01-27)
|
등록번호 |
US-7505689
(2009-03-17)
|
발명자
/ 주소 |
- Guyer,Robert C.
- Keegan,Tate J.
- LaRochelle,Kevin A.
- O'Donnell,Timothy J.
- Schlupf,Joseph M.
- Keegan,Heather L.
|
출원인 / 주소 |
- BAE Systems Information and Electronic Systems Integration Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
9 |
초록
▼
A transceiver system allows for simultaneous operation of transmit and receive modes, even in shared path configurations, by temporarily making the receiver insensitive to transmitter energy and by modifying standard readout technology to rapidly dissipate any transmitter energy deposited onto the r
A transceiver system allows for simultaneous operation of transmit and receive modes, even in shared path configurations, by temporarily making the receiver insensitive to transmitter energy and by modifying standard readout technology to rapidly dissipate any transmitter energy deposited onto the receiver's detector elements. The entirely electronic technique alerts the receiver to the imminent emission of each transmitter pulse. This alert opens a gate voltage switch in the readout and prevents energy that is present on the detector from being passed to the readout integrator. As soon as the transmitter pulse has passed and any charges it generated on the detector have been dissipated, the switch is automatically closed and the receiver is again fully active. Since this on/off switching happens automatically and rapidly it can operate independently from, and have very little impact on the receiver. Furthermore, it levies absolutely no limitations whatsoever on the operation of the transmitter.
대표청구항
▼
What is claimed is: 1. In a co-boresighted optical transceiver having a pulsed transmitter and a receiver utilizing the same aperture as said transmitter and having a detector coupled to an integrator having a normal integrating period for accumulating the detected energy, a system for permitting t
What is claimed is: 1. In a co-boresighted optical transceiver having a pulsed transmitter and a receiver utilizing the same aperture as said transmitter and having a detector coupled to an integrator having a normal integrating period for accumulating the detected energy, a system for permitting the simultaneous operation of said transmitter and receiver, comprising, a synchronization pulse for activating said transmitter to create a pulse of energy such that a transmitter pulse is produced a short time after the generation of said synchronization pulse; and a voltage controlled switch between said detector and said integrator coupled to said synchronization pulse, and without a system-level oversight processor, for interrupting the connection between said detector and said integrator upon generation of said synchronization pulse and for reestablishing said connection so as to establish a receiver blanking interval shorter than the normal integrating period for said receiver, whereby saturation of said receiver by said transmitter pulse is automatically avoided with the generation of said transmitter pulse, and whereby the receiver function is automatically reestablished so as not to materially affect receiver sensitivity; wherein the time interval between the production of said transmitter pulse and the leading edge of said sync pulse is on the order of one microsecond, thus to establish a one microsecond PreTrigger time interval. 2. The system of claim 1, wherein the time that said switch operates to interrupt said connection is much less than said normal integration period. 3. The system of claim 1, wherein the length of time that said switch operates to interrupt said connection is on the order of the transmitter pulse length. 4. The system of claim 1, and further including a detector discharging circuit coupled to said detector when said switch is interrupting said connection to dissipate any charges on said detector, whereby said blanking interval is minimized. 5. The system of claim 4, wherein said detector discharging circuit includes a ground coupled to said detector. 6. The system of claim 4, wherein said detector discharging circuit includes a reverse biasing circuit. 7. The system of claim 1, wherein the time interval between the generation of said transmitter pulse and the time that said connection is reestablished depends upon the rate at which photoelectrons can be removed from said detector. 8. The system of claim 7, wherein the time interval between the generation of said transmitter pulse and the time that said connection is reestablished is on the order of one microsecond, thereby to establish a one microsecond PostTrigger time interval. 9. In a co-boresighted optical transceiver having a pulsed transmitter and a receiver utilizing the same aperture as said transmitter and having a detector coupled to an integrator having a normal integrating period for accumulating the detected energy, a system for permitting the simultaneous operation of said transmitter and receiver, comprising, a synchronization pulse for activating said transmitter to create a pulse of energy such that a transmitter pulse is produced a short time after the generation of said synchronization pulse; a voltage controlled switch between said detector and said integrator coupled to said synchronization pulse, and without a system-level oversight processor, for interrupting the connection between said detector and said integrator upon generation of said synchronization pulse and for reestablishing said connection so as to establish a receiver blanking interval shorter than the normal integrating period for said receiver, whereby saturation of said receiver by said transmitter pulse is automatically avoided with the generation of said transmitter pulse, and whereby the receiver function is automatically reestablished so as not to materially affect receiver sensitivity, and a detector discharging circuit coupled to said detector when said switch is interrupting said connection to rapidly dissipate any charges on said detector, whereby said blanking interval is minimized; wherein the time interval between the production of said transmitter pulse and the leading edge of said sync pulse is on the order of one microsecond, thus to establish a one microsecond PreTrigger time interval. 10. The system of claim 9, wherein the time that said switch operates to interrupt said connection is less than said normal integration period. 11. The system of claim 9, wherein the length of time that said switch operates to interrupt said connection is on the order of the transmitter pulse length. 12. The system of claim 9, wherein said detector discharging circuit includes a ground coupled to said detector. 13. The system of claim 9, wherein said detector discharging circuit includes a reverse biasing circuit. 14. The system of claim 9, wherein the time interval between the generation of said transmitter pulse and the time that said connection is reestablished depends upon the rate at which photoelectrons can be removed from said detector. 15. The system of claim 14, wherein the time interval between the generation of said transmitter pulse and the time that said connection is reestablished is on the order of one microsecond, thereby to establish a one microsecond PostTrigger time interval. 16. In a co-boresighted optical transceiver having a pulsed transmitter and a receiver utilizing the same aperture as said transmitter and having a detector coupled to an integrator having a normal integrating period for accumulating the detected energy, a system for permitting the simultaneous operation of said transmitter and receiver, comprising, a synchronization pulse for activating said transmitter to create a pulse of energy such that a transmitter pulse is produced a short time after the generation of said synchronization pulse; a voltage controlled switch between said detector and said integrator coupled to said synchronization pulse, and without a system-level oversight processor, for interrupting the connection between said detector and said integrator upon generation of said synchronization pulse and for reestablishing said connection so as to establish a receiver blanking interval shorter than the normal integrating period for said receiver, whereby saturation of said receiver by said transmitter pulse is automatically avoided with the generation of said transmitter pulse, and whereby the receiver function is automatically reestablished so as not to materially affect receiver sensitivity; and a detector discharging circuit coupled to said detector when said switch is interrupting said connection to dissipate any charges on said detector, whereby said blanking interval is minimized, wherein the time that said switch operates to interrupt said connection is less than said normal integration period, the length of time that said switch operates to interrupt said connection is on the order of the transmitter pulse length, the detector discharging circuit includes a ground coupled to said detector, and the detector discharging circuit includes a reverse biasing circuit; wherein the time interval between the production of said transmitter pulse and the leading edge of said synch pulse is on the order of one microsecond, thus to establish a one microsecond PreTrigger time interval.
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