Variable gain amplifier with temperature compensated gain
Номер патента: EP4385127A1
Опубликовано: 19-06-2024
Автор(ы): John R. Francis
Принадлежит: MACOM Technology Solutions Holdings Inc
Опубликовано: 19-06-2024
Автор(ы): John R. Francis
Принадлежит: MACOM Technology Solutions Holdings Inc
Реферат: An amplifier with temperature compensation where the amplifier has transistors (Q 1 , Q 2 ) configured to amplify a received signal to create an amplified signal. The amplifier gain changes over temperature. A gain control circuit adjusts the amplifier gain responsive to a gain control signal. A temperature compensation circuit (108) includes a constant current source (144) that generates a constant current which is used to create a constant voltage, a temperature dependent current source (148) that generates a temperature dependent current which is used to create a temperature dependent voltage, such that the temperature dependent current source (148) has an inverse temperature dependence as compared to the amplifier. An operational amplifier (156) compares the constant voltage to the temperature dependent voltage and generates an offset signal which varies over temperature. A gated buffer (140) is configured to receive the offset signal and selectively modify the gain control signal.
Variable gain amplifier with temperature compensated gain
Номер патента: US12028025B2. Автор: John R. Francis. Владелец: MACOM Technology Solutions Holdings Inc. Дата публикации: 2024-07-02.