Title :
Very-high-speed Si bipolar static frequency dividers with new T-type flip-flops
Author :
Ishii, Kiyoshi ; Ichino, Haruhiko ; Togashi, Minoru ; Kobayashi, Yoshiji ; Yamaguchi, Chikara
Author_Institution :
NTT LSI Labs., Kanagawa, Japan
fDate :
1/1/1995 12:00:00 AM
Abstract :
This paper presents two circuit techniques for highspeed operation of a master-slave toggle flip-flop circuit (MSTFF). One circuit reduces the gain in latching circuits, and the other uses the transient current of the emitter followers to boost the switching speed. Both the SPICE simulations and the measured results for static 1/8 frequency dividers fabricated using 0.5-μm super self-aligned process technology (SSTIC) show that the maximum operating speed of our MS-TFF´s is 10% and 30% faster than that of conventional ones. By applying these technologies, 19.1-GHz and 22.4-GHz Si bipolar static frequency dividers have been fabricated
Keywords :
SPICE; bipolar logic circuits; flip-flops; frequency dividers; integrated circuit design; very high speed integrated circuits; 0.5 mum; 1/8 frequency dividers; 19.1 GHz; 22.4 GHz; SPICE simulation; T-type flip-flops; bipolar static frequency dividers; emitter follower transient current; frequency divider design; latching circuit gain reduction; master-slave toggle flip-flop circuit; maximum operating speed; super self-aligned process technology; switching speed; very-high-speed circuits; Capacitance; Circuit simulation; Flip-flops; Frequency conversion; Frequency measurement; Master-slave; Resistors; SPICE; Switches; Switching circuits;
Journal_Title :
Solid-State Circuits, IEEE Journal of
