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US 2010/0134218 A1Published application
Attenuator with a control circuit
AssigneeSilicon Storage Technology, Inc.
InventorsBun Kobayashi, Steven W. Schell, Pei-Ming Daniel Chow, Mau-Chung Frank Chang
Life of this patent
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Abstract
An attenuator system comprises an attenuator and a control circuit for controlling the attenuation of the attenuator. In one embodiment, the attenuator comprises two diodes or two diode connected transistors, and the control circuit comprises two transistors as the only active devices. In another embodiment, the control circuit comprises another transistor in a shut down circuit.
Claims12
An attenuator system comprising:
- an attenuator including a first input terminal for receiving a radio frequency power signal, including second and third input terminals for receiving first and second control signals, respectively, and including a first output terminal for providing a power signal in response to the radio frequency power signal and the first and second control signals;
- and
- a control circuit including a fourth input terminal for receiving a control voltage, including a fifth input terminal for receiving a supply voltage, and including second and third output terminals for providing the first and second control signals.
Dependencies are inferred from the claim text.