Finnegan, Henderson, Farabow & Garrett
Frequency divider with one-phase clock pulse generating circuit
A frequency divider wherein an output from a crystal oscillating circuit comprising a crystal oscillating element and an inverter connected in parallel therewith is sent forth as a one-phase oscillation pulse for frequency division from the input or output side of the inverter to the .phi. input terminal of a counter formed of a plurality of insulated gate field effect transistors (hereinafter abbreviated "IGFET's"). The counter comprises a plurality of cascade-connected complementary unit circuits each consisting of a series circuit of IGFET's connected between power supply terminals with IGFET's disposed on one side of an imaginary border line connecting the input and output terminals of said complementary unit circuit chosen to have a different channel type from those provided on the other side of said border line, and wherein at least the first and last complementary unit circuits' IGFET's are provided in different numbers on both sides of said border line. A one-phase pulse from the crystal oscillating circuit is supplied to the gate electrodes of the prescribed different IGFET's constituting the plural complementary unit circuits, and an output from the last complementary unit circuit of the counter is conducted to the gate electrodes of the prescribed different IGFET's constituting the other complementary unit circuits.
Tokyo Shibaura Electric Co., Ltd.
H H
H03K H03K
inventional inventional
Yasoji Tadashi
Suzuki Kuroda