This 5.1 MHz circuit was found in a 1980s documentation. The frequency is given by the crystal and general purpose transistors can be used.
August 2017 - STMicroelectronics' new T850 switches with triacs up to 8 A can be obtained from...
This circuit was obtained in a 1979 publication. The operational amplifier is of the type with...
Using junction FETs, a configurable configuration is achieved for very low frequencies. FETs can...