Circuit for boosting DC voltage
First Claim
Patent Images
1. A switch system comprising:
- a radio frequency switch element configured to receive a radio frequency (RF) input signal;
a first voltage supply terminal configured to receive a first DC supply voltage;
a boost circuit configured to receive the RF input signal and the first DC supply voltage and, in response, provide a DC output voltage that allows the RF input signal to be routed through the switch element, wherein the DC output voltage is greater than the first DC supply voltage, and wherein the first DC supply voltage is greater than zero volts.
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Abstract
A bias circuit that includes a rectifier having an input, an output and a DC control voltage input, wherein the rectifier is configured to produce the rectifier output, while providing a substantially high input impedance at the rectifier input, a rectified voltage from an alternating input signal applied at the rectifier input; and a bias extractor having an extractor input, a control voltage input and an extractor output, coupled to the rectifier output, and being configured to produce at the extractor output a DC voltage that is greater in magnitude than the DC control voltage input.
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Citations
19 Claims
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1. A switch system comprising:
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a radio frequency switch element configured to receive a radio frequency (RF) input signal; a first voltage supply terminal configured to receive a first DC supply voltage; a boost circuit configured to receive the RF input signal and the first DC supply voltage and, in response, provide a DC output voltage that allows the RF input signal to be routed through the switch element, wherein the DC output voltage is greater than the first DC supply voltage, and wherein the first DC supply voltage is greater than zero volts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of controlling a radio frequency (RF) switch comprising:
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applying an RF input signal to the RF switch and a boost circuit; applying a first DC supply voltage to the boost circuit; generating a DC output voltage in response to the first DC supply voltage and the RE input signal, wherein the DC output voltage is greater than the first DC supply voltage, and wherein the first DC supply voltage is greater than zero volts; and controlling the RF switch with the DC output voltage, wherein the DC output voltage allows the RF input signal to be routed through the RF switch. - View Dependent Claims (16, 17, 18)
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19. A switch system comprising:
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a radio frequency switch element configured to receive a radio frequency (RF) input signal and a first DC supply voltage; a first voltage supply terminal configured to receive the first DC supply voltage; a boost circuit configured to receive the RF input signal and the first DC supply voltage and, in response, provide a DC output voltage for controlling the switch element, wherein the DC output voltage is greater than the first DC supply voltage, and wherein the first DC supply voltage is greater than zero volts.
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Specification