Temperature-controlled driver with built-in self testing of switch status
AssigneeMurata Manufacturing Co., Ltd.
InventorsJeffrey A. Dykstra, Rodd E. Novak
Life of this patent
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Abstract
Methods and devices for reading and programming a state of a switch device are presented. The programming of the state of the switch device is performed by providing driving pulses to the switch device. The amplitude and the width of the driving pulses are a function of one or more of a) temperature of the switch device, b) desired state of the switch device, and c) operational time of the switch device. The described devices include a device to store the data demonstrating the functional relation between the amplitude and the width of the driving pulses and the temperature of the switch device. Such device can be a lookup table or an arithmetic logic unit (ALU). The disclosed switch devices can be PCM switches.
Claims21
A switch circuit arrangement comprising:
- a control circuit;
- a switch;
- a driver circuit coupled to the control circuit and the switch,
- wherein:
- a) the control circuit further comprises a program mode of operation that is configured to:
- i) generate a first control pulse, provided to the driver circuit to program the switch to an ON state;
- and
- ii) generate a second control pulse, provided to the driver circuit to program the switch to an OFF state;
- b) the driver circuit is configured to generate a first driving pulse in correspondence with the first control pulse;
- c) the driver circuit is configured to generate a second driving pulse in correspondence with the second control pulse, and
- d) a width and an amplitude of each of the first and the second driving pulses are each a function of a temperature of the switch.
A method of programming a state of a phase change material (PCM) switch, comprising:
- measuring a temperature of the PCM switch;
- in correspondence with an ON state of the PCM switch, applying a first driving pulse to the switch;
- in correspondence with an OFF state of the PCM switch, applying a second driving pulse to the PCM switch, and
- adjusting an amplitude and a width of the first and the second driving pulses based on the measured temperature of the PCM switch.
Dependencies are inferred from the claim text.