This circuit was found in a National Semiconductor manual from the 1980s. The integrated circuits used are equivalent. Note the need for a symmetrical power supply.
This circuit can test quartz crystals from 3.5 to 90 MHz. Its supply can be made with voltages from 8...
This divider by 9 is synchronized because it is implemented based on TTL or CMOS logic according to the...
This circuit was released in an Electronics Newsletter from June 1995. It uses a 10-channel...