High speed signal window detection
AssigneeAgilent Technologies, Inc.
InventorStefano G. Therisod
Life of this patent
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Abstract
A window detector circuit for high frequency applications includes a differential amplifier that has two inputs which receive a differential voltage signal. A bias network, having a balancing node, connected between the two inputs. An output transistor, electrically biased by the balancing node, connected between power and ground. In operation, when the differential voltage signal is below a voltage threshold, the differential amplifier is turned off and current flows through the output transistor. When the differential voltage signal is at or exceed the voltage threshold, the differential amplifier turns on.
Claims8
A window detector circuit having a differential input coupled to receive a differential voltage signal and having an output, the window detector circuit comprising:
- a differential amplifier, having a positive and negative input, each input receiving the differential voltage signal, connected between power and ground;
- a bias network, connected between the positive and negative inputs, having a bias point;
- and
- an output transistor, electrically biased by the bias point, connected between power and ground and directly connected to the window detector circuit output.
Dependencies are inferred from the claim text.