Patent ID: 8823567
Filing Date: 2014-09-02
Classification: H03H,H03M

Abstract:
1. A resonator comprising: an operational amplifier; a first resistive element connected between a first node and an inverting input terminal of the operational amplifier; a second resistive element connected between the first node and a non-inverting output terminal of the operational amplifier; a first capacitive element connected between a second node and the inverting input terminal of the operational amplifier; a second capacitive element connected between the second node and the non-inverting output terminal of the operational amplifier; a third capacitive element connected between the first node and a third node; a third resistive element connected between the second node and the third node; a fourth resistive element connected between the first node and a signal input terminal; and a fifth capacitive element connected between the signal input terminal and the inverting input terminal of the operational amplifier, wherein an overall admittance where elements connected to the first node are in parallel connection is equal to an overall admittance where elements connected to the second node are in parallel connection.