High-accuracy charge-redistribution SC video bandpass filter in standard CMOS

Quinn, Patrick

doi:10.1109/4.701233

Cited by 6 publications

(2 citation statements)

References 26 publications

(41 reference statements)

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“…10. The nMOS and pMOS input stages are connected together in this design and not separated out as previously [8]. This is because, in this design, with the use of a compact poly-poly capacitor option, the extra routing that would be needed to connect up the split capacitors and switches would take up too much area relative to the area taken up by each capacitor.…”

Section: Amplifiermentioning

confidence: 99%

A 10.7-MHz CMOS SC radio IF filter using orthogonal hardware modulation

Quinn

Hartingsveldt²,

Roermund³

2000

IEEE J. Solid-State Circuits

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Abstract-FM radio receivers require an IF filter for channel selection, customarily set at an IF center frequency of 10.7 MHz. Up until now, the limitations of integrated radio selectivity filters in terms of power dissipation, dynamic range, and cost are such that it is still required to use an external ceramic 10.7-MHz bandpass filter. This paper demonstrates a CMOS switched-capacitor IF filter that can be integrated with most of the rest of the FM receiver, eliminating external components and printed circuit board area. This is made possible through a combination of two techniques: orthogonal hardware modulation, and delta-charge redistribution. It exhibits a tightly controlled center frequency with a of 55 and also contains a programmable gain. The filter occupies an area of 0.7 mm 2 in a 0.6-m CMOS process with poly-poly capacitors. The new filter requires only 16 mW of power, and this is offset by elimination of the power needed in current designs to drive off-chip filters.

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Section: Amplifiermentioning

confidence: 99%

A 10.7-MHz CMOS SC radio IF filter using orthogonal hardware modulation

Quinn

Hartingsveldt²,

Roermund³

2000

IEEE J. Solid-State Circuits

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“…Typically, FM radio receivers require an IF filter set at a center frequency (f 0 ) of 10.7 MHz based on off-chip devices such as discrete ceramic or surface acoustic wave (SAW) components [1,2]. As off-chip filters are bulky and consume more power to drive external devices, the need for possible on-chip filters for fully viable integrated receivers has increasingly been motivated.…”

Section: Introductionmentioning

confidence: 99%

A 10.7-MHz fully balanced, high-Q, 87-dB-dynamic-range current-tunable Gm-C bandpass filter

Sa-ngiamvibool

Srisuchinwong

2008

Analog Integr Circ Sig Process

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A 10.7-MHz fully balanced, high-Q, widedynamic-range current-tunable Gm-C bandpass filter is presented. The technique is relatively simple based on two fully balanced components, i.e. an adder and a low-Qbased bandpass filter. The Q factor is approximately equal to a typically high and constant value of a common-emitter current gain (b) and is, for the first time, independent of variables such as a center frequency. Possible solutions for good stability of the Q factor with temperature are suggested. Not only can the need for additional Q-tunable circuits be greatly reduced, the sensitivity of the Q factor can be greatly improved. Sensitivities of either the Q factor or the center frequency are constant between 1 and -1 and are no longer strongly affected by the Q factor or variables. As a simple example at 10.7 MHz, the paper demonstrates the high-Q factor of 121, the low total output noise of 5.303 lV rms , the 3rd-order intermodulation-free dynamic range (IMFDR 3 ) of 74.45 dB and the wide dynamic range of 87.45 dB at 1% IM 3 . The center frequency is current tunable over three orders of magnitude. Comparisons to other 10.7-MHz Gm-C approaches are also included.

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The International Series in Engineering and Computer Science

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High-accuracy charge-redistribution SC video bandpass filter in standard CMOS

Cited by 6 publications

References 26 publications

A 10.7-MHz CMOS SC radio IF filter using orthogonal hardware modulation

A 10.7-MHz CMOS SC radio IF filter using orthogonal hardware modulation

A 10.7-MHz fully balanced, high-Q, 87-dB-dynamic-range current-tunable Gm-C bandpass filter

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