One of the more common building blocks of a voltage controlled amplifier (VCA) is a differential pair amplifier. For a VCA configuration, the (top) two bases receive a control voltage for gain control ...

Introduced as the industry's first single-chip differential amplifier capable of driving 14-bit a/d converters at 70 MHz, the AD8351 supports 10-bit distortion performance at speeds up to 240 MHz.

If you’re the sort who finds beauty in symmetry – and I’m not talking about your latest PCB layout – then you’ll appreciate this clever take on the long-tailed pair. [Kevin]’s video on this topic ...

The circuit shown is a differential amplifier that not only offers programmability but also provides a logarithmic-type gain (Fig. 1). The traditional gain-setting resistors of the amplifier, R1 and ...

Someone has posted an excellent description of how differential pairs work – both bipolar and jfet. It seems to be the 11th chapter of a book, so I hope no one has had their copyright broken (a few ...

The input stage of an amplifier performs the critical duty of subtracting the feedback signal from the input, to generate the error signal that drives the output. It ...