US5732344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive HF mixer
Assignee: Aumovio Microelectronic GmbH
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Filing: 1995-08-25
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Granted: 1998-03-24
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Expires: 2015-08-25
Abstract
Abstract HF mixer for changing the frequency of an alternating voltage input signal at the circuit input to an output signal supplied at the circuit output, with an input signal source for generating the alternating voltage input signal and a local oscillator for providing a heterodyne signal. The mixing stage has two transistors complementary to one another, and connected as base grounded circuits or gate grounded circuits, connected in parallel for the alternating voltage input signal. The two transistors are connected to the local oscillator in such a way that they are equidirectionally driven by the heterodyne signal, so that both transistors change simultaneously to the blocked or conductive state.
Inventors
- 👤 Heinz Rinderle
- 👤 Hans Sapotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:46
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1425; H03D7/1433; H03D7/1491; H03D7/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
154 words
HF mixing stage for changing the frequency of an alternating voltage input signal (ES) injected at a circuit input (IN) to an output signal (AS) supplied at a circuit output (OUT), with: an input signal source (ESQ) for generating the alternating voltage input signal (ES); a local oscillator (LO) for producing a heterodyne signal (US); and, wherein: the mixing stage has two transistors (T 1 , T 2 ) complementary to one another and connected as base grounded circuits or gate grounded circuits respectively; both transistors (T 1 , T 2 ) are connected in parallel for the alternating voltage input signal (ES); and, the two transistors (T 1 , T 2 ) are connected to local oscillator (LO) such that they are driven equidirectionally by the heterodyne signal (US) so as to cause the two transistors (T 1 , T 2 ) to change to either the blocked or the conductive state simultaneously.
Claim 2
Dependent Claim
154 words
HF mixing stage for changing the frequency of an alternating voltage input signal (ES) injected at a circuit input (IN) to an output signal (AS) supplied at a circuit output (OUT), with: an input signal source (ESQ) for generating the alternating voltage input signal (ES); a local oscillator (LO) for producing a heterodyne signal (US); and, wherein: the mixing stage has two transistors (T 1 , T 2 ) complementary to one another and connected as base grounded circuits or gate grounded circuits respectively; both transistors (T 1 , T 2 ) are connected in parallel for the alternating voltage input signal (ES); and, the two transistors (T 1 , T 2 ) are connected to local oscillator (LO) such that they are driven equidirectionally by the heterodyne signal (US) so as to cause the two transistors (T 1 , T 2 ) to change to either the blocked or the conductive state simultaneously.
Claim 3
Dependent Claim
26 words
Mixing stage in accordance with claim 1, wherein the two transistors (T 1 , T 2 ) are connected in series for a supply direct voltage.
Claim 4
Dependent Claim
61 words
Mixing stage in accordance with claim 2, wherein the alternating voltage input signal (ES) is supplied in parallel to the emitter or source electrodes of the two transistors (T 1 , T 2 ) and the output signal (AS) is picked off in parallel from the respective collector or drain electrodes of the two transistors (T 1 , T 2 ).
Claim 5
Dependent Claim
54 words
Mixing stage in accordance with claim 1, wherein the alternating voltage input signal (ES) is supplied to the respective emitter or source electrodes of the two transistors (T 1 , T 2 ) through circuit components (C 1 , C 2 , C 3 , U 1 , Tr) by capacitive or inductive coupling.
Claim 6
Dependent Claim
59 words
Mixing stage in accordance with claim 1, wherein the heterodyne signal (US) is supplied to the bases of the two transistors (T 1 , T 2 ) simultaneously with a direct voltage signal (DCQ, DCQ1, DCQ2) through circuit components (Z 1 , Z 2 , Z 3 , Z 4 , Z 5 ) for setting the bias point.
Claim 7
Dependent Claim
72 words
Mixing stage in accordance with claim 1, wherein the circuit output (OUT) is formed by a summing point or junction point (K 2 and K 3 respectively) at which the alternating currents flowing from the respective collector or drain electrodes of the two transistors (T 1 , T 2 ) are cumulated and the output signal (AS) is picked off through circuit components (C 4 , U 2 and Z 6 ).
Claim 8
Dependent Claim
34 words
Mixing stage in accordance with claim 1, wherein the respective emitter electrodes or source electrodes of the two transistors (T 1 , T 2 ) are connected together at a junction (K 1 ).
Claim 9
Dependent Claim
47 words
Mixing stage in accordance with claim 7, wherein the alternating voltage input signal (ES) is supplied to the respective emitter or source electrodes of the two transistors (T 1 , T 2 ) connected together at the junction (K 1 ) through a capacitor (C 1 ).
Claim 10
Dependent Claim
48 words
Mixing stage in accordance with claim 7, wherein the alternating voltage input signal (ES) is supplied to the respective emitter or source electrodes of the two transistors (T 1 , T 2 ) connected together at the junction (K 1 ) through a first transformer (U 1 ).
Claim 11
Dependent Claim
40 words
Mixing stage in accordance with claim 8, wherein the collectors of the two transistors (T 1 and T 2 ) are connected to the supply voltage or to the reference potential through frequency-dependent impedances (Z 7 and Z 8 ).
Claim 12
Dependent Claim
45 words
Mixing stage in accordance with claim 7, wherein the output signal (AS) is picked off at a summing point (K 2 ) at which the collectors of the two transistors (T 1 , T 2 ) are connected together through a capacitor (C 4 ).
Claim 13
Dependent Claim
49 words
Mixing stage in accordance with claim 7, wherein the output signal (AS) is picked off at a summing point (K 2 ) at which the third winding of a second transformer U 2 connecting together the collectors of the two transistors (T 1 , T 2 ) is connected.
Claim 14
Dependent Claim
54 words
Mixing stage in accordance with claim 7, wherein the base or gate electrodes of the two transistors (T 1 , T 2 ) are connected through frequency-dependent impedances (Z 1 , Z 2 ) to the local oscillator (LO) and a direct voltage source (DCQ) in order to supply the direct voltage signal (DCS).
Claim 15
Dependent Claim
38 words
Mixing stage in accordance with claim 1, wherein the respective collector or drain electrodes of the two transistors (T 1 , T 2 ) are connected together at an output junction (K 3 ) (FIG. 3, FIG. 4).
Claim 16
Dependent Claim
55 words
Mixing stage in accordance with claim 14, wherein the alternating voltage input signal (ES) applied at the circuit input (IN) is supplied in parallel to the emitter or source electrodes of the two transistors (T 1 , T 2 ) through circuit components (C 2 , C 3 ) for the purposes of DC isolation.
Claim 17
Dependent Claim
47 words
Mixing stage in accordance with claim 15, wherein the emitter or source electrode of the first transistor (T 1 ) is connected via a frequency-dependent impedances (Z 8 ) to the negative terminal of the supply direct voltage for the purposes of DC supply and AC isolation.
Claim 18
Dependent Claim
48 words
Mixing stage in accordance with claim 15, wherein the emitter or source electrode of the second transistor (T 2 ) is connected via a frequency-dependent impedance (Z 7 ) to the positive terminal (+) of the supply direct voltage for the purposes of DC supply and AC isolation.
Claim 19
Dependent Claim
123 words
Mixing stage in accordance with claim 14, wherein a transformer (Tr) with three windings is provided for coupling the input signal (ES), where the first winding (W 1 ) of the transformer (Tr) is connected at one pole to the emitter of the second transistor (T 2 ) and at the other pole to the positive terminal (+) of the supply direct voltage, the second winding (W 2 ) of the transformer (Tr) is connected at one pole to the emitter of the first transistor (T 1 ) and at the other pole to the negative terminal of the supply direct voltage, the third winding (W 3 ) of the transformer (Tr) is connected with one pole to the input signal source (ESQ).
Claim 20
Dependent Claim
29 words
Mixing stage in accordance with claim 14, wherein the output signal (AS) is picked off at the output junction (K 3 ) through a frequency-dependent impedance (Z 6 ).
Claim 21
Dependent Claim
72 words
Mixing stage in accordance with claim 14, wherein the base or gate electrodes of the two transistors (T 1 , T 2 ) are connected to frequency-dependent impedances (Z 3 , Z 4 , Z 5 ) for the purpose of suppressing the frequency of the alternating voltage input signal (ES) and to the local oscillator (LO) and each to one direct voltage source (DCQ1, DCQ2) for the purpose of voltage supply.
Claim 22
Dependent Claim
27 words
Mixing stage in accordance with claims 10, wherein the frequency-dependent impedances (Z 1 -Z 8 ) are provided in the form of passive or electronically active components.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-23 | 2001-09-22 | 2002-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-23 | 2005-09-22 | 2006-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-23 | 2009-09-22 | 2010-03-24 | $7700.00 | Window Closed / Lapsed |