Back to results
US 6,774,680 B2Granted
Comparator including a differential transistor pair and a diode arrangement
AssigneeHitachi, Ltd.
InventorsKengo Imagawa, Norio Chujo, Kaoru Arita, Yoshiharu Umemura, Masahiro Imanari
Life of this patent
Estimating the term…
Abstract
A comparator is provided with a pair of transistors which are continuously in ON state, in which a switch unit constructed of a diode pair, for switching a current path in response to a high/low relationship between a voltage level of an input signal and a voltage level of a reference voltage, and a unit for converting a current into a voltage level are provided between emitter terminals of the transistor pair.
Claims18
A comparator comprising:
- a diode provided at an input terminal;
- a differential transistor pair including transistors, said transistors being turned ON/OFF in response to a high/low relationship between a voltage level of an input signal and a voltage level of a reference voltage;
- a circuit constituted by diodes between base terminals of said differential transistor pair;
- and
- means for converting a current which is switched by said differential transistor pair into a voltage level.
2 more elements
A comparator comprising:
- a differential transistor pair including transistors, said transistors being turned ON/OFF in response to a high/low relationship between a voltage level of an input signal and a voltage level of a reference voltage;
- diodes provided at emitter terminals and diodes provided across emitters and bases of said differential transistor pairs;
- and
- means for converting a current which is switched by said differential transistor pair into a voltage level.
1 more element
A comparator comprising:
- a diode bridge circuit provided at one of input terminals;
- a differential transistor pair including transistors, said transistors being turned ON/OFF in response to a high/low relationship between a voltage level of an input signal and a voltage level of a reference voltage;
- a push-pull circuit provided between base terminals of said differential transistor pair;
- and
- means for converting a current which is switched by said differential transistor pair into a voltage level.
2 more elements
Dependencies are inferred from the claim text.