Class / Patent application number | Description | Number of patent applications / Date published |
333213000 | NEGATIVE RESISTANCE OR REACTANCE NETWORKS OF THE ACTIVE TYPE | 12 |
20130038409 | TECHNIQUES FOR DEVELOPING A NEGATIVE IMPEDANCE - Techniques to develop negative impedance circuits that may operate to their power supply rails. The techniques may include generating currents in response to voltage signals presented at respective input terminals of a negative impedance circuit. The voltage signals may be differential signals. The generated currents may be driven through a common impedance within the negative impedance circuit. The currents flowing through the common impedance may be mirrored back to the input terminals of the negative impedance circuit. The negative impedance circuit may be controlled to operate about a common-mode voltage for the circuit. | 02-14-2013 |
20150035625 | INDUCTOR - An inductor ( | 02-05-2015 |
20150365062 | EM COUPLING SHIELDING - A method and an apparatus for canceling EM coupling are provided. The apparatus includes a ring structure at least partially surrounding an EM circuit. A negative transconductance circuit is coupled to ends of the ring structure. The negative transconductance circuit is configured to cancel an EM coupling to the EM circuit at a frequency. The method includes generating a plurality of settings for a negative transconductance circuit and tuning the negative transconductance circuit to one of the plurality of settings for the negative transconductance circuit to cancel an EM coupling to an EM circuit at a frequency. | 12-17-2015 |
333214000 | Simulating specific type of reactance | 7 |
20080204171 | METHODS AND APPARATUS FOR PROGRAMMABLE ACTIVE INDUCTANCE - Methods and apparatus are provided for programmable active inductance. The disclosed active inductor devices provide a tunable bandwidth with improved linearity. The disclosed active inductors have a variable frequency response corresponding to a variable inductance of the active inductor. The active inductor comprises a variable resistive circuit having an effective resistance, wherein the variable resistive circuit is comprised of at least one resistor that can be selectively bypassed in the variable resistive circuit to vary the effective resistive. The active inductor has an inductance that can be varied by varying the effective resistance. | 08-28-2008 |
20080309436 | MULTI-INPUT MULTI-OUTPUT AMPLIFIER, AN ACTIVE INDUCTOR, A FILTER AND A RADIO COMMUNICATION DEVICE - A non-inverting amplifier includes n external input terminals which receive n (n≧3) input voltage signals having a constant sum of voltages, respectively, n amplification units each including n−1 internal input terminals connected to n−1 terminals of the n external input terminals in a different combination for each of the amplification units, n−1 voltage-to-current converters which convert input voltage signals from the internal input terminals into current signals, and a load which converts an added current signal obtained by adding up the current signals into an output voltage signal, and n external output terminals which output n output voltage signals from the n amplification units. | 12-18-2008 |
20100039191 | ACTIVE INDUCTOR FOR ASIC APPLICATION - An apparatus and method for manufacturing low-cost high-density compact active inductor module using existing DRAM, SRAM and logic process integration. The elements of the active inductor modules are formed by three semiconductor devices including nMOS devices, deep-trench capacitors and a polysilicon or TaN resistor. The active inductor modules can be connected in a parallel and/or serial configuration to obtain a wide range of inductance values. The modular active inductors can be advantageously stored in an ASIC library to facilitate a flexible and convenient circuit design. | 02-18-2010 |
20140028416 | Low-Voltage Active Inductor - An active inductor circuit includes a field-effect transistor having a first source/drain adapted for connection with a first voltage source, a capacitor coupled between the first voltage source and a gate of the field-effect transistor, a resistor coupled between a second source/drain of the field-effect transistor and the gate of the field-effect transistor, and a current source coupled with the gate of the field-effect transistor. A voltage headroom of the active inductor circuit is controlled as a function of at least one of a magnitude of current generated by the current source and a resistance of the resistor. | 01-30-2014 |
20140292448 | LOW-NOISE ELECTRONIC CIRCUIT SIMULATING THE BEHAVIOR OF AN INDUCTANCE - An electronic circuit simulating the behavior of an inductance between a respective input node and a reference potential. The electronic circuit comprises a compensation network electrically connected between ground and a source potential and an inverting amplification stage electrically connected to the output of the compensation network. The inverting amplification stage comprises a transistor having a control terminal connected to the input of the inverting amplification stage, a first bias terminal operatively connected to the output of the inverting amplification stage, and a second bias terminal operatively connected to ground. The inverting amplification stage further comprises a feedback capacitance interposed between the first bias terminal and the control terminal of the transistor, and a feedback inductance interposed between the second bias terminal of the transistor and ground. | 10-02-2014 |
333215000 | Using gyrator | 2 |
20090033440 | ACTIVE RESONANT CIRCUIT WITH RESONANT-FREQUENCY TUNABILITY - The present invention is directed to provide a low-power-consumption wide-range RF signal processing unit having a small chip occupation area. A semiconductor integrated circuit has, on a semiconductor chip, a resonant circuit including a first capacitor having a capacitance which can be controlled by a first control signal of a first control terminal, and a gyrator for equivalently emulating an inductor by including a second capacitor having a capacitance which can be controlled by a second control signal of a second control terminal. The capacitance and the inductor form a parallel resonant circuit. At the time of changing parallel resonant frequency, the capacitances of the first and second capacitors are coordinately changed. The parallel resonant circuit is suitable for an active load which is connected to an output node of an amplifier. | 02-05-2009 |
20100039192 | Active Inductance for Very High Frequencies Based on CMOS Inverters - The present disclosure relates to techniques for simulating electrical inductance. | 02-18-2010 |
333216000 | Having negative impedance | 2 |
20120256709 | Differential negative impedance converters and inverters with variable or tunable conversion ratios - A differential circuit topology that produces a tunable floating negative inductance, negative capacitance, negative resistance/conductance, or a combination of the three. These circuits are commonly referred to as “non-Foster circuits.” The disclosed embodiments of the circuits comprises two differential pairs of transistors that are cross-coupled, a load immittance, multiple current sources, two Common-Mode FeedBack (CMFB) networks, at least one tunable (variable) resistance, and two terminals across which the desired immittance is present. The disclosed embodiments of the circuits may be configured as either a Negative Impedance Inverter (NII) or a Negative Impedance Converter (NIC) and as either Open-Circuit-Stable (OCS) and Short-Circuit-Stable (SCS). | 10-11-2012 |
20140062621 | Method and Apparatus for an Active Negative-Capacitor Circuit to Cancel the Input Capacitance of Comparators - The differential output of a Programmable Gain Amplifier (PGA) is loaded by the input differential gate capacitance of a plurality of Analog to Digital converters (ADC) comparators and the differential metal layer traces to interconnect these comparators to the PGA. The differential capacitive load presented to the PGA is quite large and reduces the bandwidth of this interconnect between the PGA and ADC. To overcome the performance degradation due to the differential capacitive load, an active negative-capacitor circuit cancels the effect of the large input capacitance of the ADC comparators. This cancellation extends the gain characteristics of the interconnect between the PGA's output and the inputs of the first stage of the comparators. The active negative-capacitance is comprised of a cross pair NMOS with a capacitor connecting their sources where each NMOS is biased by a current source. | 03-06-2014 |