Patent
Bidirectional sensor circuit
| العنوان: | Bidirectional sensor circuit |
|---|---|
| Patent Number: | 11448,667 |
| تاريخ النشر: | September 20, 2022 |
| Appl. No: | 16/955829 |
| Application Filed: | December 21, 2018 |
| مستخلص: | A bidirectional sensor circuit includes a sensing impedance with first and second terminals; a first operational amplifier which non-inverting input is connected to the first terminal and its inverting input is connected to the second terminal; a second operational amplifier with the non-inverting input connected to the second terminal and its inverting input is connected to the first terminal; a first diode with the anode connected to the inverting input of the first operational amplifier and whose cathode is connected to the output of the first operational amplifier; and a second diode with the anode connected to the output of the first operational amplifier and to the cathode of the first diode. The input of the circuit consists of the terminals of the sensing impedance, and the output is at the anode of the second diode and senses a load impedance connected to the first terminal of the sensing impedance. |
| Inventors: | PANACEA QUANTUM LEAP TECHNOLOGY LLC (Dallas, TX, US) |
| Assignees: | PANACEA QUANTUM LEAP TECHNOLOGY LLC (Dallas, TX, US) |
| Claim: | 1. A bi-directional sensor circuit comprising: a sensing impedance with a first terminal and a second terminal; a first operational amplifier for which the non-inverting input is connected to the first terminal and its inverting input is connected to the second terminal; a second operational amplifier with the non-inverting input connected to the second terminal and its inverting input is connected to the first terminal; a first diode with the anode connected to the inverting input of the first operational amplifier and for which the cathode is connected to the output of the first operational amplifier; a second diode with the anode connected to the output of the first operational amplifier and to the cathode of the first diode; a variable impedance connected to the anode of the first diode and to the cathode of the second diode; a fourth diode with the cathode connected to the cathode of the second diode and to one end of the variable impedance; a third diode with the anode connected to the inverting input of the second operational amplifier and the cathode to the output of the second operational amplifier and to the anode of the fourth diode; a variable impedance connected to the cathode of the fourth diode and the anode of the third diode; wherein the input of the bidirectional sensor circuit consists of the terminals and of the sensing impedance, and the output is at the anode of the second diode and senses a load impedance connected to the first terminal of the sensing impedance. |
| Claim: | 2. The circuit of claim 1 , wherein the non-inverting input of the first operational amplifier is connected to the first terminal through an impedance and its inverting input is connected to the second terminal through an impedance; the non-inverting input of the second operational amplifier is connected to the second terminal through an impedance and its inverting input is connected to the first terminal through an impedance. |
| Claim: | 3. The circuit of claim 1 , wherein the anode-cathode terminals of all the diodes are reversed, an inverter circuit is connected to the cathode of the diode, connected by its anode to the output of the first operational amplifier. |
| Claim: | 4. The circuit of claim 1 , wherein the terminals and of the sensing impedance are connected to an instrumentation Wheatstone bridge; the instrumentation Wheatstone bridge has: a first terminal, a second terminal, a third terminal and a fourth terminal; a second impedance connected to the first terminal and to the third terminal; a third impedance connected to the second terminal and the third terminal; a fourth impedance connected to the second terminal and the fourth terminal; an alternating current generator connected to the third terminal and the fourth terminal; the first terminal connected to the second terminal of the sensing impedance; the second terminal connected to the first terminal of the sensing impedance; and a load impedance is connected to the first terminal and the fourth terminal. |
| Claim: | 5. The circuit of claim 1 , wherein the anode of the second diode connects to the input of a digital-analog converter; and a control unit is connected to the output of the digital-analog converter. |
| Claim: | 6. The circuit of claim 5 , wherein the control unit is connected to a signal generator connected to a transducer, the transducer is connected to the first terminal of the sensing impedance; wherein the transducer is the load impedance. |
| Claim: | 7. A bi-directional sensor circuit with inverter, comprising: a sensing impedance with a first terminal and a second terminal; a first operational amplifier for which the non-inverting input is connected to the first terminal and its inverting input is connected to the second terminal; a second operational amplifier with the non-inverting input connected to the second terminal and its inverting input is connected to the first terminal; a first diode with the cathode connected to the inverting input of the first operational amplifier and for which the anode is connected to the output of the first operational amplifier; a second diode with the cathode connected to the output of the first operational amplifier and to the anode of the first diode; a variable impedance connected to the cathode of the first diode and to the anode of the second diode; a fourth diode with the anode connected to the anode of the second diode and to one end of the variable impedance; a third diode with the cathode connected to the inverting input of the second operational amplifier and the anode to the output of the second operational amplifier and to the cathode of the fourth diode; a variable impedance connected to the anode of the fourth diode and the cathode of the third diode; wherein the input of the bidirectional sensor circuit consists of the terminals and of the sensing impedance, and the output is at the anode of the second diode connected to an operational inverter circuit, and senses a load impedance connected to the first terminal of the sensing impedance. |
| Patent References Cited: | 5254951 October 1993 Goto et al. 5498984 March 1996 Schaffer 6985774 January 2006 Kieval et al. 7183756 February 2007 Dikken 2012/0302821 November 2012 Burnett 2014/0254238 September 2014 Gilbert 2019/0376854 December 2019 Quackenbush |
| Other References: | ELG4135L8, Apuntes Ramo. Universidad de Ottawa, [online] Jul. 12, 2017 [retrieved on Apr. 13, 2019], <https://web.archive.org/web/20170712154445/https://www.site/uottawa.ca/˜rhabash/ELG4134L8.pdf>. cited by applicant OPA4330, Datasheet [en linea], Texas Instruments, 2016, [retrieved on Apr. 13, 2019], Retrieved from <http://www.ti.com/lit/ds/symlink/opa4330.pdf>. cited by applicant INA193-INA198, Datasheet [en linea], Texas Instruments, 2015 [retrieved on Apr. 13, 2019], Retrieved from <http://www/ti.com/lit/ds/symlink/ina193.pdf>. cited by applicant International Search Report dated Apr. 22, 2019 for PCT/IB2018/060548. cited by applicant Written Opinion of the International Searching Authority dated Apr. 22, 2019 for PCT/IB2018/060548. cited by applicant |
| Primary Examiner: | Hawkins, Dominic E |
| Attorney, Agent or Firm: | Faegre Drinker Biddle & Reath LLP |
| رقم الانضمام: | edspgr.11448667 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |