Hy-Q International Australia - Quartz Filter Package Styles

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Crystal Filter Package Styles

Monolithic Filters Discrete Filters

Monolithic Crystal Filters

A range of monolithic filters are available covering the frequency range 9 MHz to 75 MHz including the standard IF's of 10.7 MHz, 21.4 MHz and 45 MHz available in 12.5 kHz and 25 kHz channel spacing.

10.7 MHz Filters
No. of Poles	Available Styles
2	QC53
4	QC53 x2
6	QFP7, QFP9, QFP10
8	QFP7, QFP9, QFP11

21.4 MHz Filters
No. of Poles	Available Styles
2	QC44
4	QC44 x2
6	QFP22
8	QFP23, QFP9

45 MHz Filters
No. of Poles	Available Styles
2	QC44
4	QC44 x2

Up to 45 MHz the fundamental mode of the crystal is utilised ensuring the lowest possible impedance levels and best spurious mode characteristics. Above 45 MHz the 3rd overtone mode is used.

3rd Overtone 45 MHz to 75 MHz Filters
No. of Poles	Available Styles
2	QC44
4	QC44 x2

Discrete Crystal Filters

A range of discrete crystal filters is available covering the frequency range 1.5 MHz to 21.4 MHz. Some of the most popular frequencies are:

IF	Application	Available Styles
1.5 MHz	Single/upper/lower side band	QFP16
2.5 MHz	Single/upper/lower side band	QFP26
10.7 MHz	Wide bandwidth, linear phase	QFP9, QFP25
21.4 MHz	Wide bandwidth, linear phase	QFP9, QFP25

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Crystal Filter Package Styles Monolithic Filters Discrete Filters

Monolithic Crystal Filters

Discrete Crystal Filters

Crystal Filter Package Styles

Monolithic Filters Discrete Filters