Differential input stage for wideband reception with high rejection of common mode
First Claim
Patent Images
1. An integrated circuit comprising:
- at least one differential input stage having two differential inputs and one output, the at least one differential input stage comprising an input circuit and a shaping circuit connected to the input circuit for providing a binary output signal at an output terminal;
said input circuit having two inputs connected to the two inputs of the differential input stage and comprisingfirst means coupled to said two inputs to provide a first pair of differential signals when the two inputs receive signals in a first range of voltage, and a zero differential voltage when the two inputs receive said signals outside the first range of voltage, andsecond means coupled to said two inputs to provide a second pair of differential signals when the two inputs receive said signals in a second range of voltage, and a zero differential voltage when the two inputs receive said signals outside the second range of voltage,said first means and said second means having substantially identical signal propagation times.
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Abstract
An integrated circuit comprises at least one differential input stage. The differential input stage includes an input circuit and a shaping circuit. The input circuit comprises a first portion and a second portion for providing two pairs of differential signals. The propagation times of the first and second circuit portions are preferably substantially identical. The shaping circuit differentiates each of the two pairs of differential signals and combines them to obtain a single binary type of signal.
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Citations
29 Claims
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1. An integrated circuit comprising:
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at least one differential input stage having two differential inputs and one output, the at least one differential input stage comprising an input circuit and a shaping circuit connected to the input circuit for providing a binary output signal at an output terminal; said input circuit having two inputs connected to the two inputs of the differential input stage and comprising first means coupled to said two inputs to provide a first pair of differential signals when the two inputs receive signals in a first range of voltage, and a zero differential voltage when the two inputs receive said signals outside the first range of voltage, and second means coupled to said two inputs to provide a second pair of differential signals when the two inputs receive said signals in a second range of voltage, and a zero differential voltage when the two inputs receive said signals outside the second range of voltage, said first means and said second means having substantially identical signal propagation times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An integrated circuit differential input stage comprising:
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an input circuit comprising first means coupled to two inputs to provide a first pair of differential signals when the two inputs receive signals in a first range of voltage, and a zero differential voltage when the two inputs receive said signals outside the first range of voltage, and second means coupled to said two inputs to provide a second pair of differential signals when the two inputs receive said signals in a second range of voltage, and a zero differential voltage when the two inputs receive said signals outside the second range of voltage, said first means and said second means having substantially identical signal propagation times; and a shaping circuit connected to receive the first pair and second pair of said differential signals of the input circuit for providing a binary output signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An integrated circuit comprising:
- an input circuit comprising
a first circuit coupled to two inputs to provide a first pair of differential signals when the two inputs receive signals in a first range of voltage, and a substantially zero differential voltage when the two inputs receive said signals outside the first range of voltage, and a second circuit coupled to said two inputs to provide a second pair of differential signals when the two inputs receive said signals in a second range of voltage, and a substantially zero differential voltage when the two inputs receive said signals outside the second range of voltage, said first and second circuits having substantially identical signal propagation times; and a shaping circuit connected to receive the first pair and second pair of said differential signals of the input circuit for providing a binary output signal. - View Dependent Claims (24, 25, 26, 27, 28, 29)
- an input circuit comprising
Specification