최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | UP-0413738 (2006-04-28) |
등록번호 | US-7619419 (2009-11-27) |
발명자 / 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 4 인용 특허 : 954 |
A wideband differential signal probe includes separate paths to convert a lower frequency component and a higher frequency component of a differential signal to a lower frequency single ended signal and a higher frequency single ended signal which are combined for the probe's output which is commonl
A wideband differential signal probe includes separate paths to convert a lower frequency component and a higher frequency component of a differential signal to a lower frequency single ended signal and a higher frequency single ended signal which are combined for the probe's output which is commonly input to instrumentation.
I claim: 1. A probe for communicating a differential signal of a device under test, said differential signal comprising at least one of a higher frequency component, including at least one of a higher frequency common mode signal and a higher frequency differential mode signal, and a lower frequenc
I claim: 1. A probe for communicating a differential signal of a device under test, said differential signal comprising at least one of a higher frequency component, including at least one of a higher frequency common mode signal and a higher frequency differential mode signal, and a lower frequency component, including at least one of a lower frequency common mode signal and a lower frequency differential mode signal, said probe comprising: (a) a choke attenuating said higher frequency common mode signal of said differential signal and having a choke output comprising at least one of said higher frequency differential mode signal and said lower frequency component of said differential signal; (b) a first filter blocking said higher frequency differential mode signal of said choke output and transmitting said lower frequency component of said choke output; (c) a differential amplifier attenuating said lower frequency common mode signal of said lower frequency component transmitted by said first filter and converting said lower frequency differential mode signal to a single ended, lower frequency signal; (d) a second filter blocking transmission of said lower frequency component of said common mode choke output and transmitting a higher frequency single ended signal corresponding to said higher frequency differential mode signal; and (e) a combiner summing said single ended, lower frequency signal and said single ended, higher frequency signal. 2. The probe of claim 1 wherein a loop gain of said differential amplifier is less than unity. 3. A probe for communicating a differential signal of a device under test, said differential signal comprising at least one of a higher frequency component, including at least one of a higher frequency common mode signal and a higher frequency differential mode signal, and a lower frequency component, including at least one of a lower frequency common mode signal and a lower frequency differential mode signal between a device under test and an instrument, said probe comprising: (a) a choke attenuating said higher frequency common mode signal of said differential signal and having a choke output comprising at least one of said higher frequency differential mode signal and said lower frequency component of said differential signal; (b) a first filter blocking said higher frequency differential mode signal of said choke output and transmitting said lower frequency component of said choke output; (c) a differential amplifier attenuating said lower frequency common mode signal of said lower frequency component transmitted by said first filter and converting said lower frequency differential mode signal to a single ended, lower frequency signal; (d) a second filter blocking transmission of said lower frequency component of said common mode choke output and transmitting a higher frequency single ended signal corresponding to said higher frequency differential mode signal; and (e) a resistive combiner to combine said single ended, lower frequency signal and said single ended, higher frequency signal; (f) a first attenuator conductively connected to said combiner and to an input of said differential amplifier; and (g) a second attenuator conductively connected to said combiner and to an output of said differential amplifier. 4. A probe for communicating a differential signal of a device under test, said differential signal comprising at least one of a higher frequency component, including at least one of a higher frequency common mode signal and a higher frequency differential mode signal, and a lower frequency component, including at least one of a lower frequency common mode signal and a lower frequency differential mode signal, said probe comprising: (a) a choke attenuating said higher frequency common mode signal of said differential signal and having a choke output comprising at least one of said higher frequency differential mode signal and said lower frequency component of said differential signal; (b) a first filter blocking said higher frequency differential mode signal of said choke output and transmitting said lower frequency component of said choke output; (c) a differential amplifier attenuating said lower frequency common mode signal of said lower frequency component transmitted by said first filter and converting said lower frequency differential mode signal to a single ended, lower frequency signal; (d) a second filter blocking transmission of said lower frequency component of said common mode choke output and transmitting said higher frequency differential mode signal; (e) a distributed amplifier receiving said higher frequency differential mode signal and outputting a single ended higher frequency signal; and (f) a resistive combiner to combine said single ended, lower frequency signal and said single ended, higher frequency signal. 5. A probe for communicating a differential signal of a device under test, said differential signal comprising at least one of a higher frequency component, including at least one of a higher frequency common mode signal and a higher frequency differential mode signal, and a lower frequency component, including at least one of a lower frequency common mode signal and a lower frequency differential mode signal, said probe comprising: (a) a choke attenuating said higher frequency common mode signal of said differential signal and having a choke output comprising at least one of said higher frequency differential mode signal and said lower frequency component of said differential signal; (b) a first filter blocking said higher frequency differential mode signal of said choke output and transmitting said lower frequency component of said choke output; (c) a differential amplifier attenuating said lower frequency common mode signal of said lower frequency component transmitted by said first filter and converting said lower frequency differential mode signal to a single ended, lower frequency signal, said differential amplifier having; (i)a variable lower frequency common mode signal input impedance; and (ii)a variable lower frequency differential mode signal input impedance; (d) a second filter blocking transmission of said lower frequency component of said common mode choke output and transmitting said higher frequency differential mode signal; (e) an attenuator of said higher frequency differential mode signal transmitted from said second filter; (f) a distributed amplifier receiving said attenuated higher frequency differential mode signal and outputting a single ended higher frequency signal; and (g) a combiner summing said single ended, lower frequency signal and said single ended, higher frequency signal.
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