Patent ID: 8264289
Filing Date: 2012-09-11
Classification: H03B

Abstract:
1. An oscillator, comprising: a first voltage node; a second voltage node; a first, a second and a third grounded capacitors; and a first, a second and a third operational transconductance amplifiers (OTAs) connected in a serial sequence, wherein, each OTA has a particular transconductance value, and each OTA has a negative input, a positive input, and one or two outputs, wherein one of the negative input and the positive input of each OTA is configured as a predetermined input, and the other of the negative input and the positive input of each OTA is configured to be grounded; and the predetermined input of the first OTA is connected to the first grounded capacitor and connected to first outputs of all OTAs, the first grounded capacitor is connected to the predetermined input of the first OTA, is connected to a first input of the third OTA, the predetermined input of the second OTA is connected to the second grounded capacitor and connected to a second output of the first OTA, and the predetermined input of the third OTA is connected to the third grounded capacitor and connected to a second output of the second OTA.