Back to results
US 4,902,909 AGranted
Flip-flop arrangement for a divide-by-2 frequency divider comprising master-slave type memory elements
AssigneeU.S. Philips Corporation
InventorBernard Chantepie
Life of this patent
Estimating the term…
Abstract
A flip-flop (40) for a divide-by-2 frequency divider having a first stage (50) formed by two master-slave-type memory elements (10a, 10b) each having a two-input NOR gate (20a, 20b), and by a second stage (60) with 2 NOR gates (61, 62) connected as an RS flip-flop. The memory elements (10a, 10b) also include an enhancement-type MESFET transistor (30a, 30b), the gates (Ga, Gb) and the drains (Da, Db) of said transistors (30a, 30b) being coupled to the respective inputs of the NOR-gates (20a, 20b).
Claims2
Flip-flop arrangement for halving a frequency of a signal received on an input terminal, comprising:
- a RS-flip-flop with a first and a second logic gate that have their first gate inputs mutually intercoupled to their gate outputs;
- a third logic gate and a fourth logic gate having respective gate outputs coupled to a second gate input of the first and the second logic gate, respectively, and having first gate inputs coupled to a gate output of the second and first logic gate, respectively, via a conduction path of a first and a second switch, respectively the second gate inputs of the third and fourth logic gates and control inputs of switches being coupled to said input terminal.
Dependencies are inferred from the claim text.