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United States Utility Patents
5,812,020 - 5,812,029

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NumberTitle
5,812,020 Positive current source
5,812,021 Semiconductor integrated circuit device having an internal power supply circuit capable of stably maintaining output level against load fluctuation
5,812,022 Differential amplifier circuit having low noise input transistors
5,812,023 Voltage offset compensation circuit
5,812,024 Stabilization of gain-bandwidth product in analog circuit devices
5,812,025 Automatic-gain-control circuit compensating for changes in gain control characteristics
5,812,026 Differential amplifier with improved voltage gain
5,812,027 Spike insensitive intermediate frequency amplifier
5,812,028 Audio signal amplifier circuit and a portable acoustic apparatus using the same
5,812,029 Gain control circuit and method



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