| ZETEX SEMICONDUCTORS PLC Patent applications |
| Patent application number | Title | Published |
|---|
| 20100237847 | POWER SUPPLY CIRCUIT - A power supply circuit has a first MOSFET having a body region between the source and drain. The body region is connected so as to be at the same potential as the source. Application of a suitable potential to the gate causes the MOSFET to switch to a conductive on state. The power supply circuit also has signal generation circuitry, which generates a signal indicative of a conductive state of the first MOSFET. The signal generation circuitry generates a reference voltage of a predetermined potential difference from the source potential. The power supply circuit further comprises a second MOSFET having a body region connected so as to be at the same potential as the drain of the first MOSFET, and the second gate is connected to receive the reference voltage. When the potential of the drain of the first MOSFET falls a predetermined voltage below the reference voltage the second MOSFET is switched to a conductive on state between the second source and the second drain, the signal being dependent upon the state of the second MOSFET. | 09-23-2010 |
| 20100201337 | Voltage regulator for low noise block - A voltage regulator comprises first and second capacitors and regulation means arranged to provide a respective regulated charging current from an input terminal to each of the capacitors. The regulation means comprises at least one device through which at least a portion of the respective charging current to at least one of the capacitors is supplied. The device is controllable with a control signal to regulate current flow through the device. The regulation means further comprises control signal supply means connected to the output terminal and arranged to provide said control signal to the device, the control signal being dependent upon voltage at the output terminal such that current flow through the device is regulated according to the voltage at the output terminal. | 08-12-2010 |
| 20100194368 | Current driving method and circuit - A circuit comprises an inductor, a load, and a controllable switching device arranged in either a first configuration: switchable between the load being bypassed and the inductor energised, and current flowing through the load, and the inductor discharging energy into the load; or, a second configuration: switchable between current being permitted to flow through the load, inductor and controllable switching device in series, energising the inductor, and the current flowing through the load, and the inductor discharging energy into the load. The circuit further comprises control means for controlling the switching device, a load current sensing resistor connected in series with the load, and a demand signal input. Monitoring means is arranged to monitor the demand signal and the voltages across the sense resistors, and generate a monitor signal. The control means is arranged to receive the monitor signal and to switch the switching device in response the monitor signal exceeding a predetermined threshold. | 08-05-2010 |
| 20100193922 | Semiconductor chip package - A semiconductor chip package is disclosed comprising a semiconductor chip, a lead frame comprising at least one lead, and an encapsulating layer at least partially encapsulating the semiconductor chip and the lead frame. The lead comprises a first portion defining a lead frame pad at least partially exposed at an exterior surface of the package and a second portion extending from the first portion towards the semiconductor chip electrically connecting a surface portion of the semiconductor chip to the lead frame pad. The first portion has a first thickness and the second portion comprises a thinned portion, the thinned portion having a thickness smaller than the first thickness. The lead further comprises a bent portion, and wherein the thinned portion comprises at least part of the bent portion. | 08-05-2010 |
| 20080285586 | Multiplexer - A multiplexer ( | 11-20-2008 |
| 20080284516 | Monolithic Lna Support Ic - A low noise amplifier (LNA) comprises: a plurality of FETs (F | 11-20-2008 |
