Loop filter for data converter in wireless communication system and method of implementing corresponding loop filter
US-9496890-B2 · Nov 15, 2016 · US
Delta-sigma modulator, integrator, and wireless communication device
US8937567B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937567-B2 |
| Application number | US-201313779366-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 27, 2013 |
| Priority date | Sep 7, 2010 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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A delta-sigma modulator includes: an integrator having an operational amplifier; a quantizer quantizing an output of the integrator; a first D-A converter converting an output of the quantizer to a current signal to provide negative feedback to the operational amplifier; a feedforward path feeding forward an input of the integrator to the quantizer; and a second D-A converter converting the output of the quantizer to a current signal to provide negative feedback to the quantizer. The integrator includes a resistive element having a first end connected to the input of the integrator and a second end connected to an inverting input of the operational amplifier, n capacitive circuits connected in series between the inverting input and an output of the operational amplifier, and (n−1) resistive elements each having a first end connected to an interconnecting node of the capacitive circuits and a second end connected to a common node.
First claim
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What is claimed is: 1. A delta-sigma modulator, comprising: an integrator including an operational amplifier; a quantizer configured to quantize an output of the integrator; a first D-A converter configured to convert a digital output of the quantizer to a current signal to provide negative feedback to an inverting input end of the operational amplifier; a feedforward path configured to feed forward an input signal of the integrator to an input end of the quantizer; and a…
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- What does patent US8937567B2 cover?
- A delta-sigma modulator includes: an integrator having an operational amplifier; a quantizer quantizing an output of the integrator; a first D-A converter converting an output of the quantizer to a current signal to provide negative feedback to the operational amplifier; a feedforward path feeding forward an input of the integrator to the quantizer; and a second D-A converter converting the out…
- Who is the assignee on this patent?
- Panasonic Corp, Panasonic Ip Man Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H03M3/438. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 20 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).