High speed D trigger based on transistor

The invention discloses a high speed D trigger based on a transistor, and mainly solves the problems that an existing D trigger is high in phase noise and low in working frequency. The high speed D trigger based on the transistor mainly comprises a first latch (1), a second latch (2), a preset circuit (3), a first current source circuit (4a) and a second current source circuit (4b). The preset circuit (3) composed of a difference channel is connected with an output end of the second latch (2) and a current input end of the second latch (2). The preset circuit (3) is controlled by external signals to achieve a preset function. The first current source circuit (4a) is connected with a current input end of the first latch (1), and provides stable current for the first latch (1). The second current source circuit (4b) is connected with the current input end of the second latch (2), and provides stable current for the second latch (2). The high speed D trigger based on the transistor has the advantages of being simple in circuit, low in phase noise, high in working frequency, and the like. Accordingly, the high speed D trigger based on the transistor can be applied to a high speed program divider.